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Номер 299, страница 110 - гдз по алгебре 9 класс учебник Бунимович, Кузнецова
Авторы: Бунимович Е. А., Кузнецова Л. В., Минаева С. С., Рослова Л. О., Суворова С. Б.
Тип: Учебник
Серия: сферы 1-11
Издательство: Просвещение
Год издания: 2018 - 2026
Цвет обложки: оранжевый с диаграммой
ISBN: 978-5-09-051312-8
Популярные ГДЗ в 9 классе
Глава 3. Уравнения и системы уравнений. 3.7 Алгебраическое решение систем уравнений с двумя переменными - номер 299, страница 110.
App\Models\Task {#1030 // resources/views/models/task/default.blade.php #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 199044 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "110" "field_page_end" => null "field_url" => "/9-klass/algebra/bunimovich-uchebnik/01-299" "field_display_title" => "299" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037 #items: array:1 [ 0 => App\Models\Term {#1036 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #original: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1035 #items: [] #escapeWhenCastingToString: false } "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1046 #items: array:1 [ 0 => App\Models\Branch {#1045 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 198670 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Уравнения и системы уравнений" "field_branch_order" => "3" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1050 #items: array:1 [ 0 => App\Models\Term {#1047 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ "field_accusative_case" => "Главу" "field_creative_case" => "Главой" "field_dative_case" => "Главе" "field_genitive_case" => "Главы" "field_nominative_case" => "Глава" "field_prepositional_case" => "Главе" ] "field_page_check_not_needed" => null "field_short_name" => null ] #original: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ "field_accusative_case" => "Главу" "field_creative_case" => "Главой" "field_dative_case" => "Главе" "field_genitive_case" => "Главы" "field_nominative_case" => "Глава" "field_prepositional_case" => "Главе" ] "field_page_check_not_needed" => null "field_short_name" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_page_start" => "81" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1083 #items: array:1 [ 0 => App\Models\Book {#1049 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 2789 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1051 #items: array:1 [ 0 => App\Models\Term {#1048 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6471 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Алгебра" "field_abbreviated_name" => null "field_cases" => array:6 [ "field_accusative_case" => "алгебру" "field_creative_case" => "алгеброй" "field_dative_case" => "алгебре" "field_genitive_case" => "алгебры" "field_nominative_case" => "алгебра" "field_prepositional_case" => "алгебре" ] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "algebra" ] #original: array:10 [ "id" => 6471 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Алгебра" "field_abbreviated_name" => null "field_cases" => array:6 [ "field_accusative_case" => "алгебру" "field_creative_case" => "алгеброй" "field_dative_case" => "алгебре" "field_genitive_case" => "алгебры" "field_nominative_case" => "алгебра" "field_prepositional_case" => "алгебре" ] "field_foreign_lang_name" => null "field_short_name" => null "field_subject_type" => "technical_subject" "field_translit" => "algebra" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_class" => Illuminate\Database\Eloquent\Collection {#1052 #items: array:1 [ 0 => App\Models\Term {#1053 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5458 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "9" "field_cases" => array:6 [ "field_accusative_case" => "девятый" "field_creative_case" => "девятым" "field_dative_case" => "девятому" "field_genitive_case" => "девятого" "field_nominative_case" => "девятый" "field_prepositional_case" => "девятом" ] "field_translit" => "devjatyj" ] #original: array:6 [ "id" => 5458 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "9" "field_cases" => array:6 [ "field_accusative_case" => "девятый" "field_creative_case" => "девятым" "field_dative_case" => "девятому" "field_genitive_case" => "девятого" "field_nominative_case" => "девятый" "field_prepositional_case" => "девятом" ] "field_translit" => "devjatyj" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_publisher" => Illuminate\Database\Eloquent\Collection {#1054 #items: array:1 [ 0 => App\Models\Term {#1055 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 5153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Просвещение" "field_cases" => null "field_translit" => "prosveschenie" ] #original: array:6 [ "id" => 5153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Просвещение" "field_cases" => null "field_translit" => "prosveschenie" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_author" => Illuminate\Database\Eloquent\Collection {#1056 #items: array:5 [ 0 => App\Models\Term {#1057 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 3941 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Бунимович" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Евгений" "field_patronymic" => "Абрамович" "field_surname_rp" => null ] #original: array:12 [ "id" => 3941 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Бунимович" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Евгений" "field_patronymic" => "Абрамович" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Term {#1058 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 4848 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Кузнецова" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Людмила" "field_patronymic" => "Викторовна" "field_surname_rp" => null ] #original: array:12 [ "id" => 4848 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Кузнецова" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Людмила" "field_patronymic" => "Викторовна" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Term {#1059 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 5198 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Минаева" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Светлана" "field_patronymic" => "Станиславовна" "field_surname_rp" => null ] #original: array:12 [ "id" => 5198 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Минаева" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Светлана" "field_patronymic" => "Станиславовна" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 3 => App\Models\Term {#1060 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 5622 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Рослова" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Лариса" "field_patronymic" => "Олеговна" "field_surname_rp" => null ] #original: array:12 [ "id" => 5622 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Рослова" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Лариса" "field_patronymic" => "Олеговна" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 4 => App\Models\Term {#1061 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ "id" => 5879 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Суворова" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Светлана" "field_patronymic" => "Борисовна" "field_surname_rp" => null ] #original: array:12 [ "id" => 5879 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Суворова" "field_bio" => null "field_degree_rp" => null "field_foreign_lang_name" => null "field_foreign_lang_patronymic" => null "field_foreign_lang_surname" => null "field_name" => "Светлана" "field_patronymic" => "Борисовна" "field_surname_rp" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1062 #items: [] #escapeWhenCastingToString: false } "field_book_type" => Illuminate\Database\Eloquent\Collection {#1063 #items: array:1 [ 0 => App\Models\Term {#1064 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ "field_accusative_case" => "учебник" "field_creative_case" => "учебником" "field_dative_case" => "учебнику" "field_genitive_case" => "учебника" "field_nominative_case" => "учебник" "field_prepositional_case" => "учебнике" ] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #original: array:10 [ "id" => 6671 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Учебник" "field_book_type_foreign" => null "field_cases" => array:6 [ "field_accusative_case" => "учебник" "field_creative_case" => "учебником" "field_dative_case" => "учебнику" "field_genitive_case" => "учебника" "field_nominative_case" => "учебник" "field_prepositional_case" => "учебнике" ] "field_plural_form" => null "field_short_name" => null "field_short_name_foreign" => null "field_translit" => "uchebnik" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_country" => Illuminate\Database\Eloquent\Collection {#1065 #items: array:1 [ 0 => App\Models\Term {#1066 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "rossiya" ] #original: array:6 [ "id" => 9 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Россия" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "rossiya" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_city" => Illuminate\Database\Eloquent\Collection {#1067 #items: array:1 [ 0 => App\Models\Term {#1068 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 15 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Москва" "field_cases" => array:6 [ "field_accusative_case" => null "field_creative_case" => null "field_dative_case" => null "field_genitive_case" => null "field_nominative_case" => null "field_prepositional_case" => null ] "field_translit" => "moskva" ] 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Алгебраические выражения порой способны поставить в тупик и отличников, что уж говорить о подростках, которые больше склонны к гуманитарным дисциплинам? Поэтому помощь <strong>ГДЗ по алгебре 9 класс учебное пособие Бунимович, Кузнецова, Минаева (Просвещение)</strong> может оказаться незаменимой, особенно при текущих нагрузках. </p> <p> Больше всего трудностей возникает у ребят при изучении следующих тем: </p> <ol> <li>Общие свойства неравенств.</li> <li>Квадратичная функция и её график.</li> <li>Рациональные выражения.</li> <li>Числовые последовательности.</li> <li>Интервальный ряд. Гистограмма.</li> <li>Статистическое оценивание и прогноз.</li> </ol> <p> Уроки нередко проходят срезано, так как за 45 минут преподавателям нужно многое успеть. Они объясняют лишь часть темы, оставляя все остальное для самостоятельного разбора. Но много ли учеников проводит дома свободное время с учебником? Конечно, нет. В основном учащиеся наспех выполняют заданные номера и моментально забывают о них. 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Поэтому большинство школьников подходит к работе с <strong>решебником Бунимовича по алгебре за 9 класс</strong> ответственно и внимательно. </p> <p> Учителя-предметники, да и сами авторы пособия рекомендуют всегда придерживаться следующих правил: </p> <ol> <li>не забывать про освоение теоретического материала;</li> <li>выполнять домашние задания без подсказок со стороны;</li> <li>когда все сделано, можно приступать к сверке решений по ГДЗ;</li> <li>работа над ошибками - тоже немаловажный аспект.</li> </ol> <p> Подобный подход несомненно принесет пользу, а результаты станут заметны через пару занятий. Первая же контрольная принесет хорошие плоды, так как перед этим подростки подробно проработали все аспекты каждого параграфа. Происходит это ненавязчиво и не отнимает много времени, что придется по душе всем ребятам. </p> <h2> Чем именно полезен решебник? </h2> <p> Современная учебная программа в основном направлена на практику. Считается, что чем больше упражнений выполнят школьники, тем лучше они поймут новую тему. Но не всегда такой метод срабатывает. Все же понимание теории - немаловажная составляющая полноценных знаний по предмету. Но в условиях тотальных нагрузок преподавателям просто не остается достаточно времени для проработки всех нюансов. Так что у ребят остается один шанс не упустить ничего важного - это использовать <strong>гдз по алгебре 9 класс к учебнику Бунимович Е.А (2018-2023 гг.)</strong>. </p> <p> Для того чтобы упростить ученикам понимание параграфов, авторы издания разместили в нем: </p> <ul> <li>подробные решения ко всем номерам;</li> <li>верные ответы;</li> <li>готовые графики и заполненные таблицы;</li> <li>детальные наглядные примеры.</li> </ul> <p> Все, что нужно сделать подросткам - это правильно воспользоваться предоставленными сведениями. Расположение решебника и постоянный онлайн-доступ делают работу с ним простым делом, которое займет от силы несколько минут. 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#primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 198670 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Уравнения и системы уравнений" "field_branch_order" => "3" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1124 #items: array:1 [ 0 => App\Models\Term {#1047} ] #escapeWhenCastingToString: false } "field_page_start" => "81" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1125 #items: array:1 [ 0 => App\Models\Book {#1049} ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1126 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 198670 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Уравнения и системы уравнений" "field_branch_order" => "3" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1124} "field_page_start" => "81" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1125} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1126} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Branch {#1127 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 198677 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "3.7 Алгебраическое решение систем уравнений с двумя переменными" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1128 #items: [] #escapeWhenCastingToString: false } "field_page_start" => "106" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1129 #items: array:1 [ 0 => App\Models\Book {#1049} ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1130 #items: array:1 [ 0 => App\Models\Branch {#1045} ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 198677 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "3.7 Алгебраическое решение систем уравнений с двумя переменными" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1128} "field_page_start" => "106" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1129} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1130} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1112 #items: array:3 [ 0 => App\Models\Element {#1105 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 210681 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1097 #items: array:1 [ 0 => App\Models\Edition {#1104 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 700 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1102 #items: array:1 [ …1] #escapeWhenCastingToString: false } "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "tolik" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1100 #items: [] #escapeWhenCastingToString: false } "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1101 #items: [] #escapeWhenCastingToString: false } "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1098 #items: [] #escapeWhenCastingToString: false } "field_content_source" => null ] #original: array:21 [ "id" => 700 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Условие" "field_order" => "1" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1102} "field_content_type" => "free" "field_content_mode" => "text, image" "field_page_content_mode" => "image" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Автор" "field_moderator" => "tolik" "field_edition_type" => "statement" "field_root_dir" => "0-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1100} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1101} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1098} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "199044" "type" => "task" ] "text" => "<p><strong>299</strong> Решите систему уравнений способом подстановки (№ 298–299):</p><p><strong>а)</strong> $\begin{cases} xy = -4, \\ x^2 + y^2 = 8; \end{cases}$</p><p><strong>б)</strong> $\begin{cases} x^2 + y^2 = 29, \\ xy = -10; \end{cases}$</p><p><strong>в)</strong> $\begin{cases} 2x^2 - y^2 = 14, \\ xy = 6. \end{cases}$</p>" "img" => array:2 [ 0 => array:5 [ "name" => "299-1.jpg" "alt" => null "width" => null "height" => null "path" => "/media/algebra_09/bunimovich-u18/0-01/299-1.webp?ts=1734190334" ] 1 => array:5 [ "name" => "299-2.jpg" "alt" => null "width" => null "height" => null "path" => "/media/algebra_09/bunimovich-u18/0-01/299-2.webp?ts=1734190334" ] ] ] #original: array:7 [ "id" => 210681 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1097} "task" => array:2 [ "refs" => "199044" "type" => "task" ] "text" => "<p><strong>299</strong> Решите систему уравнений способом подстановки (№ 298–299):</p><p><strong>а)</strong> $\begin{cases} xy = -4, \\ x^2 + y^2 = 8; \end{cases}$</p><p><strong>б)</strong> $\begin{cases} x^2 + y^2 = 29, \\ xy = -10; \end{cases}$</p><p><strong>в)</strong> $\begin{cases} 2x^2 - y^2 = 14, \\ xy = 6. \end{cases}$</p>" "img" => array:2 [ 0 => array:5 [ "name" => "299-1.jpg" "alt" => null "width" => null "height" => null "path" => "/media/algebra_09/bunimovich-u18/0-01/299-1.webp?ts=1734190334" ] 1 => array:5 [ "name" => "299-2.jpg" "alt" => null "width" => null "height" => null "path" => "/media/algebra_09/bunimovich-u18/0-01/299-2.webp?ts=1734190334" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Element {#1099 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 211833 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1089 #items: array:1 [ 0 => App\Models\Edition {#1096 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 701 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение" "field_order" => "2" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1095 #items: array:1 [ …1] #escapeWhenCastingToString: false } "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Неизвестный" "field_moderator" => "tolik" "field_edition_type" => "solution" "field_root_dir" => "1-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1093 #items: [] #escapeWhenCastingToString: false } "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1087 #items: [] #escapeWhenCastingToString: false } "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1092 #items: [] #escapeWhenCastingToString: false } "field_content_source" => null ] #original: array:21 [ "id" => 701 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение" "field_order" => "2" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1095} "field_content_type" => "free" "field_content_mode" => "image" "field_page_content_mode" => "" "field_content_text_checked" => "0" "field_page_content_text_checked" => "0" "field_solution_author" => "Неизвестный" "field_moderator" => "tolik" "field_edition_type" => "solution" "field_root_dir" => "1-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1093} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1087} "field_process_formula" => "" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1092} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "199044" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "299-1.jpg" "alt" => null "width" => null "height" => null "path" => "/media/algebra_09/bunimovich-u18/1-01/299-1.webp?ts=1734190392" ] ] ] #original: array:6 [ "id" => 211833 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1089} "task" => array:2 [ "refs" => "199044" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "299-1.jpg" "alt" => null "width" => null "height" => null "path" => "/media/algebra_09/bunimovich-u18/1-01/299-1.webp?ts=1734190392" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Element {#1091 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1421557 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1034 #items: array:1 [ 0 => App\Models\Edition {#1090 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 5321 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 2" "field_order" => "3" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1085 #items: array:1 [ …1] #escapeWhenCastingToString: false } "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "vadim" "field_edition_type" => "solution" "field_root_dir" => "2-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1086 #items: [] #escapeWhenCastingToString: false } "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1082 #items: [] #escapeWhenCastingToString: false } "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1084 #items: [] #escapeWhenCastingToString: false } "field_content_source" => null ] #original: array:21 [ "id" => 5321 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "title" => "Решение 2" "field_order" => "3" "field_publisher" => Illuminate\Database\Eloquent\Collection {#1085} "field_content_type" => "free" "field_content_mode" => "text" "field_page_content_mode" => "" "field_content_text_checked" => null "field_page_content_text_checked" => "0" "field_solution_author" => "Gemini 2.5 Pro" "field_moderator" => "vadim" "field_edition_type" => "solution" "field_root_dir" => "2-" "field_responsible" => Illuminate\Database\Eloquent\Collection {#1086} "field_comment" => null "field_similar_book" => Illuminate\Database\Eloquent\Collection {#1082} "field_process_formula" => "katex" "field_edition_group" => Illuminate\Database\Eloquent\Collection {#1084} "field_content_source" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "199044" "type" => "task" ] "text" => "<p><strong>а)</strong> Дана система уравнений:<br>$\begin{cases}xy = -4 \\x^2 + y^2 = 8\end{cases}$<br>Из первого уравнения выразим $y$ через $x$:<br>$y = -\frac{4}{x}$ (при условии, что $x \ne 0$).<br>Подставим это выражение во второе уравнение:<br>$x^2 + (-\frac{4}{x})^2 = 8$<br>$x^2 + \frac{16}{x^2} = 8$<br>Умножим обе части уравнения на $x^2$, чтобы избавиться от знаменателя:<br>$x^4 + 16 = 8x^2$<br>$x^4 - 8x^2 + 16 = 0$<br>Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.<br>$t^2 - 8t + 16 = 0$<br>Это уравнение является полным квадратом:<br>$(t-4)^2 = 0$<br>Отсюда $t = 4$.<br>Вернемся к замене:<br>$x^2 = 4$<br>$x_1 = 2$, $x_2 = -2$.<br>Теперь найдем соответствующие значения $y$:<br>Если $x_1 = 2$, то $y_1 = -\frac{4}{2} = -2$.<br>Если $x_2 = -2$, то $y_2 = -\frac{4}{-2} = 2$.<br>Таким образом, решениями системы являются пары чисел $(2, -2)$ и $(-2, 2)$.<br>Ответ: $(2, -2), (-2, 2)$.</p><p><strong>б)</strong> Дана система уравнений:<br>$\begin{cases}x^2 + y^2 = 29 \\xy = -10\end{cases}$<br>Из второго уравнения выразим $y$ через $x$:<br>$y = -\frac{10}{x}$ (при условии, что $x \ne 0$).<br>Подставим это выражение в первое уравнение:<br>$x^2 + (-\frac{10}{x})^2 = 29$<br>$x^2 + \frac{100}{x^2} = 29$<br>Умножим обе части на $x^2$:<br>$x^4 + 100 = 29x^2$<br>$x^4 - 29x^2 + 100 = 0$<br>Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.<br>$t^2 - 29t + 100 = 0$<br>Решим квадратное уравнение с помощью дискриминанта:<br>$D = b^2 - 4ac = (-29)^2 - 4 \cdot 1 \cdot 100 = 841 - 400 = 441 = 21^2$<br>$t_1 = \frac{-b + \sqrt{D}}{2a} = \frac{29 + 21}{2} = \frac{50}{2} = 25$<br>$t_2 = \frac{-b - \sqrt{D}}{2a} = \frac{29 - 21}{2} = \frac{8}{2} = 4$<br>Оба корня положительны, поэтому оба подходят. Вернемся к замене:<br>1) $x^2 = 25 \implies x_1 = 5, x_2 = -5$.<br>2) $x^2 = 4 \implies x_3 = 2, x_4 = -2$.<br>Найдем соответствующие значения $y$ для каждого $x$:<br>Если $x_1 = 5$, то $y_1 = -\frac{10}{5} = -2$.<br>Если $x_2 = -5$, то $y_2 = -\frac{10}{-5} = 2$.<br>Если $x_3 = 2$, то $y_3 = -\frac{10}{2} = -5$.<br>Если $x_4 = -2$, то $y_4 = -\frac{10}{-2} = 5$.<br>Решениями системы являются пары чисел: $(5, -2), (-5, 2), (2, -5), (-2, 5)$.<br>Ответ: $(5, -2), (-5, 2), (2, -5), (-2, 5)$.</p><p><strong>в)</strong> Дана система уравнений:<br>$\begin{cases}2x^2 - y^2 = 14 \\xy = 6\end{cases}$<br>Из второго уравнения выразим $y$ через $x$:<br>$y = \frac{6}{x}$ (при условии, что $x \ne 0$).<br>Подставим это выражение в первое уравнение:<br>$2x^2 - (\frac{6}{x})^2 = 14$<br>$2x^2 - \frac{36}{x^2} = 14$<br>Умножим обе части на $x^2$:<br>$2x^4 - 36 = 14x^2$<br>$2x^4 - 14x^2 - 36 = 0$<br>Разделим уравнение на 2:<br>$x^4 - 7x^2 - 18 = 0$<br>Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.<br>$t^2 - 7t - 18 = 0$<br>Решим квадратное уравнение. По теореме Виета, корни $t_1$ и $t_2$ удовлетворяют условиям $t_1 + t_2 = 7$ и $t_1 \cdot t_2 = -18$.<br>Подбором находим корни: $t_1 = 9$ и $t_2 = -2$.<br>Корень $t_2 = -2$ не удовлетворяет условию $t \ge 0$, поэтому он является посторонним.<br>Рассмотрим $t_1 = 9$.<br>Вернемся к замене:<br>$x^2 = 9$<br>$x_1 = 3$, $x_2 = -3$.<br>Найдем соответствующие значения $y$:<br>Если $x_1 = 3$, то $y_1 = \frac{6}{3} = 2$.<br>Если $x_2 = -3$, то $y_2 = \frac{6}{-3} = -2$.<br>Решениями системы являются пары чисел $(3, 2)$ и $(-3, -2)$.<br>Ответ: $(3, 2), (-3, -2)$.</p>" ] #original: array:6 [ "id" => 1421557 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1034} "task" => array:2 [ "refs" => "199044" "type" => "task" ] "text" => "<p><strong>а)</strong> Дана система уравнений:<br>$\begin{cases}xy = -4 \\x^2 + y^2 = 8\end{cases}$<br>Из первого уравнения выразим $y$ через $x$:<br>$y = -\frac{4}{x}$ (при условии, что $x \ne 0$).<br>Подставим это выражение во второе уравнение:<br>$x^2 + (-\frac{4}{x})^2 = 8$<br>$x^2 + \frac{16}{x^2} = 8$<br>Умножим обе части уравнения на $x^2$, чтобы избавиться от знаменателя:<br>$x^4 + 16 = 8x^2$<br>$x^4 - 8x^2 + 16 = 0$<br>Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.<br>$t^2 - 8t + 16 = 0$<br>Это уравнение является полным квадратом:<br>$(t-4)^2 = 0$<br>Отсюда $t = 4$.<br>Вернемся к замене:<br>$x^2 = 4$<br>$x_1 = 2$, $x_2 = -2$.<br>Теперь найдем соответствующие значения $y$:<br>Если $x_1 = 2$, то $y_1 = -\frac{4}{2} = -2$.<br>Если $x_2 = -2$, то $y_2 = -\frac{4}{-2} = 2$.<br>Таким образом, решениями системы являются пары чисел $(2, -2)$ и $(-2, 2)$.<br>Ответ: $(2, -2), (-2, 2)$.</p><p><strong>б)</strong> Дана система уравнений:<br>$\begin{cases}x^2 + y^2 = 29 \\xy = -10\end{cases}$<br>Из второго уравнения выразим $y$ через $x$:<br>$y = -\frac{10}{x}$ (при условии, что $x \ne 0$).<br>Подставим это выражение в первое уравнение:<br>$x^2 + (-\frac{10}{x})^2 = 29$<br>$x^2 + \frac{100}{x^2} = 29$<br>Умножим обе части на $x^2$:<br>$x^4 + 100 = 29x^2$<br>$x^4 - 29x^2 + 100 = 0$<br>Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.<br>$t^2 - 29t + 100 = 0$<br>Решим квадратное уравнение с помощью дискриминанта:<br>$D = b^2 - 4ac = (-29)^2 - 4 \cdot 1 \cdot 100 = 841 - 400 = 441 = 21^2$<br>$t_1 = \frac{-b + \sqrt{D}}{2a} = \frac{29 + 21}{2} = \frac{50}{2} = 25$<br>$t_2 = \frac{-b - \sqrt{D}}{2a} = \frac{29 - 21}{2} = \frac{8}{2} = 4$<br>Оба корня положительны, поэтому оба подходят. Вернемся к замене:<br>1) $x^2 = 25 \implies x_1 = 5, x_2 = -5$.<br>2) $x^2 = 4 \implies x_3 = 2, x_4 = -2$.<br>Найдем соответствующие значения $y$ для каждого $x$:<br>Если $x_1 = 5$, то $y_1 = -\frac{10}{5} = -2$.<br>Если $x_2 = -5$, то $y_2 = -\frac{10}{-5} = 2$.<br>Если $x_3 = 2$, то $y_3 = -\frac{10}{2} = -5$.<br>Если $x_4 = -2$, то $y_4 = -\frac{10}{-2} = 5$.<br>Решениями системы являются пары чисел: $(5, -2), (-5, 2), (2, -5), (-2, 5)$.<br>Ответ: $(5, -2), (-5, 2), (2, -5), (-2, 5)$.</p><p><strong>в)</strong> Дана система уравнений:<br>$\begin{cases}2x^2 - y^2 = 14 \\xy = 6\end{cases}$<br>Из второго уравнения выразим $y$ через $x$:<br>$y = \frac{6}{x}$ (при условии, что $x \ne 0$).<br>Подставим это выражение в первое уравнение:<br>$2x^2 - (\frac{6}{x})^2 = 14$<br>$2x^2 - \frac{36}{x^2} = 14$<br>Умножим обе части на $x^2$:<br>$2x^4 - 36 = 14x^2$<br>$2x^4 - 14x^2 - 36 = 0$<br>Разделим уравнение на 2:<br>$x^4 - 7x^2 - 18 = 0$<br>Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.<br>$t^2 - 7t - 18 = 0$<br>Решим квадратное уравнение. По теореме Виета, корни $t_1$ и $t_2$ удовлетворяют условиям $t_1 + t_2 = 7$ и $t_1 \cdot t_2 = -18$.<br>Подбором находим корни: $t_1 = 9$ и $t_2 = -2$.<br>Корень $t_2 = -2$ не удовлетворяет условию $t \ge 0$, поэтому он является посторонним.<br>Рассмотрим $t_1 = 9$.<br>Вернемся к замене:<br>$x^2 = 9$<br>$x_1 = 3$, $x_2 = -3$.<br>Найдем соответствующие значения $y$:<br>Если $x_1 = 3$, то $y_1 = \frac{6}{3} = 2$.<br>Если $x_2 = -3$, то $y_2 = \frac{6}{-3} = -2$.<br>Решениями системы являются пары чисел $(3, 2)$ и $(-3, -2)$.<br>Ответ: $(3, 2), (-3, -2)$.</p>" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "199045" "type" => "task" ] "previous" => array:2 [ "refs" => "199043" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1108 #items: array:1 [ 0 => App\Models\Book {#1049} ] #escapeWhenCastingToString: false } "page" => Illuminate\Database\Eloquent\Collection {#1111 #items: array:1 [ 0 => App\Models\BookPage {#1042 #connection: "mysql" #table: "book_pages" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 926456 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "110" "field_url" => "/9-klass/algebra/bunimovich-uchebnik/page-110" "field_display_title" => "110" "field_folder" => "1" "field_image_name" => "110" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1040 #items: [] #escapeWhenCastingToString: false } "field_weight" => "0" "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1043 #items: array:1 [ 0 => 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#original: array:6 [ "id" => 1100633 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1133} "book_page" => array:2 [ "refs" => "926456" "type" => "book_page" ] "img" => array:1 [ …1] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "926457" "type" => "book_page" ] "previous" => array:2 [ "refs" => "926455" "type" => "book_page" ] "tasks" => Illuminate\Database\Eloquent\Collection {#1205 #items: array:7 [ 0 => App\Models\Task {#1219 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 199042 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "110" "field_page_end" => null "field_url" => "/9-klass/algebra/bunimovich-uchebnik/01-297" "field_display_title" => "297" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1220 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1221 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1222 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1223 …2} "content" => Illuminate\Database\Eloquent\Collection {#1226 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1232 …2} "page" => array:2 [ …2] ] 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"field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1231 …2} "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1233 …2} "parent_branches" => Illuminate\Database\Eloquent\Collection {#1229 …2} "content" => Illuminate\Database\Eloquent\Collection {#1228 …2} "next" => array:2 [ …2] "previous" => array:2 [ …2] "book" => Illuminate\Database\Eloquent\Collection {#1246 …2} "page" => array:2 [ …2] ] #original: array:24 [ "id" => 199043 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "110" "field_page_end" => null "field_url" => "/9-klass/algebra/bunimovich-uchebnik/01-298" "field_display_title" => "298" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1224 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] 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[] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 3 => App\Models\Task {#1242 #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 199045 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "110" "field_page_end" => null "field_url" => "/9-klass/algebra/bunimovich-uchebnik/01-300" "field_display_title" => "300" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1255 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => 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№299 (с. 110)
Условие. №299 (с. 110)
скриншот условия
299 Решите систему уравнений способом подстановки (№ 298–299):
а) $\begin{cases} xy = -4, \\ x^2 + y^2 = 8; \end{cases}$
б) $\begin{cases} x^2 + y^2 = 29, \\ xy = -10; \end{cases}$
в) $\begin{cases} 2x^2 - y^2 = 14, \\ xy = 6. \end{cases}$
Решение. №299 (с. 110)
Решение 2. №299 (с. 110)
а) Дана система уравнений:
$\begin{cases}xy = -4 \\x^2 + y^2 = 8\end{cases}$
Из первого уравнения выразим $y$ через $x$:
$y = -\frac{4}{x}$ (при условии, что $x \ne 0$).
Подставим это выражение во второе уравнение:
$x^2 + (-\frac{4}{x})^2 = 8$
$x^2 + \frac{16}{x^2} = 8$
Умножим обе части уравнения на $x^2$, чтобы избавиться от знаменателя:
$x^4 + 16 = 8x^2$
$x^4 - 8x^2 + 16 = 0$
Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.
$t^2 - 8t + 16 = 0$
Это уравнение является полным квадратом:
$(t-4)^2 = 0$
Отсюда $t = 4$.
Вернемся к замене:
$x^2 = 4$
$x_1 = 2$, $x_2 = -2$.
Теперь найдем соответствующие значения $y$:
Если $x_1 = 2$, то $y_1 = -\frac{4}{2} = -2$.
Если $x_2 = -2$, то $y_2 = -\frac{4}{-2} = 2$.
Таким образом, решениями системы являются пары чисел $(2, -2)$ и $(-2, 2)$.
Ответ: $(2, -2), (-2, 2)$.
б) Дана система уравнений:
$\begin{cases}x^2 + y^2 = 29 \\xy = -10\end{cases}$
Из второго уравнения выразим $y$ через $x$:
$y = -\frac{10}{x}$ (при условии, что $x \ne 0$).
Подставим это выражение в первое уравнение:
$x^2 + (-\frac{10}{x})^2 = 29$
$x^2 + \frac{100}{x^2} = 29$
Умножим обе части на $x^2$:
$x^4 + 100 = 29x^2$
$x^4 - 29x^2 + 100 = 0$
Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.
$t^2 - 29t + 100 = 0$
Решим квадратное уравнение с помощью дискриминанта:
$D = b^2 - 4ac = (-29)^2 - 4 \cdot 1 \cdot 100 = 841 - 400 = 441 = 21^2$
$t_1 = \frac{-b + \sqrt{D}}{2a} = \frac{29 + 21}{2} = \frac{50}{2} = 25$
$t_2 = \frac{-b - \sqrt{D}}{2a} = \frac{29 - 21}{2} = \frac{8}{2} = 4$
Оба корня положительны, поэтому оба подходят. Вернемся к замене:
1) $x^2 = 25 \implies x_1 = 5, x_2 = -5$.
2) $x^2 = 4 \implies x_3 = 2, x_4 = -2$.
Найдем соответствующие значения $y$ для каждого $x$:
Если $x_1 = 5$, то $y_1 = -\frac{10}{5} = -2$.
Если $x_2 = -5$, то $y_2 = -\frac{10}{-5} = 2$.
Если $x_3 = 2$, то $y_3 = -\frac{10}{2} = -5$.
Если $x_4 = -2$, то $y_4 = -\frac{10}{-2} = 5$.
Решениями системы являются пары чисел: $(5, -2), (-5, 2), (2, -5), (-2, 5)$.
Ответ: $(5, -2), (-5, 2), (2, -5), (-2, 5)$.
в) Дана система уравнений:
$\begin{cases}2x^2 - y^2 = 14 \\xy = 6\end{cases}$
Из второго уравнения выразим $y$ через $x$:
$y = \frac{6}{x}$ (при условии, что $x \ne 0$).
Подставим это выражение в первое уравнение:
$2x^2 - (\frac{6}{x})^2 = 14$
$2x^2 - \frac{36}{x^2} = 14$
Умножим обе части на $x^2$:
$2x^4 - 36 = 14x^2$
$2x^4 - 14x^2 - 36 = 0$
Разделим уравнение на 2:
$x^4 - 7x^2 - 18 = 0$
Сделаем замену переменной. Пусть $t = x^2$, где $t \ge 0$.
$t^2 - 7t - 18 = 0$
Решим квадратное уравнение. По теореме Виета, корни $t_1$ и $t_2$ удовлетворяют условиям $t_1 + t_2 = 7$ и $t_1 \cdot t_2 = -18$.
Подбором находим корни: $t_1 = 9$ и $t_2 = -2$.
Корень $t_2 = -2$ не удовлетворяет условию $t \ge 0$, поэтому он является посторонним.
Рассмотрим $t_1 = 9$.
Вернемся к замене:
$x^2 = 9$
$x_1 = 3$, $x_2 = -3$.
Найдем соответствующие значения $y$:
Если $x_1 = 3$, то $y_1 = \frac{6}{3} = 2$.
Если $x_2 = -3$, то $y_2 = \frac{6}{-3} = -2$.
Решениями системы являются пары чисел $(3, 2)$ и $(-3, -2)$.
Ответ: $(3, 2), (-3, -2)$.
Другие задания:
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