Номер 137, страница 44 - гдз по алгебре 9 класс учебник Солтан, Солтан

Алгебра, 9 класс Учебник, авторы: Солтан Генадий Николаевич, Солтан Алла Евгеньевна, Жумадилова Аманбала Жумадиловна, издательство Кокшетау, Алматы, 2019

Авторы: Солтан Г. Н., Солтан А. Е., Жумадилова А. Ж.

Тип: Учебник

Издательство: Кокшетау

Год издания: 2019 - 2026

ISBN: 978-601-317-424-2

Рекомендовано Министерством образования и науки Республики Казахстан

I. Уравнения, неравенства с двумя переменными и их системы. 4. Неравенства с двумя переменными - номер 137, страница 44.

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                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1169 …2}
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                    "field_responsible" => Illuminate\Database\Eloquent\Collection {#1170 …2}
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            "created_at" => "2026-04-10 13:58:26"
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                    "created_at" => "2026-04-10 13:58:26"
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            "task" => array:2 [
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              "type" => "task"
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            "text" => "<p><strong>а)</strong> Исходное уравнение: $\sqrt{y^2 + \frac{2}{3}xy + \frac{1}{9}x^2} = y + \frac{1}{3}x$. Заметим, что выражение под знаком корня является полным квадратом суммы: $y^2 + 2 \cdot y \cdot (\frac{1}{3}x) + (\frac{1}{3}x)^2 = (y + \frac{1}{3}x)^2$. Подставив это в исходное уравнение, получаем: $\sqrt{(y + \frac{1}{3}x)^2} = y + \frac{1}{3}x$. Используя свойство арифметического квадратного корня $\sqrt{a^2} = |a|$, уравнение принимает вид: $|y + \frac{1}{3}x| = y + \frac{1}{3}x$. Равенство вида $|z| = z$ выполняется тогда и только тогда, когда выражение $z$ неотрицательно, то есть $z \ge 0$. В нашем случае $z = y + \frac{1}{3}x$, следовательно, решением является неравенство $y + \frac{1}{3}x \ge 0$. Выразим $y$: $y \ge -\frac{1}{3}x$. Множество пар чисел $(x; y)$, являющихся решениями уравнения, — это все точки координатной плоскости, лежащие на прямой $y = -\frac{1}{3}x$ и выше неё. Графически это замкнутая полуплоскость.<br>Ответ: Множеством решений является замкнутая полуплоскость, заданная неравенством $y \ge -\frac{1}{3}x$.</p><p><strong>б)</strong> Исходное уравнение: $\sqrt{y^2 - \frac{1}{2}xy + \frac{1}{16}x^2} = -y + \frac{1}{4}x$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot (\frac{1}{4}x) + (\frac{1}{4}x)^2 = (y - \frac{1}{4}x)^2$. Тогда уравнение можно переписать в виде: $\sqrt{(y - \frac{1}{4}x)^2} = -y + \frac{1}{4}x$. Преобразуем правую часть уравнения: $-y + \frac{1}{4}x = -(y - \frac{1}{4}x)$. Используя свойство $\sqrt{a^2} = |a|$, получаем: $|y - \frac{1}{4}x| = -(y - \frac{1}{4}x)$. Равенство вида $|z| = -z$ выполняется тогда и только тогда, когда выражение $z$ неположительно, то есть $z \le 0$. В нашем случае $z = y - \frac{1}{4}x$, следовательно, решением является неравенство $y - \frac{1}{4}x \le 0$. Выразим $y$: $y \le \frac{1}{4}x$. Множество решений — это все точки координатной плоскости, лежащие на прямой $y = \frac{1}{4}x$ и ниже неё. Графически это замкнутая полуплоскость.<br>Ответ: Множеством решений является замкнутая полуплоскость, заданная неравенством $y \le \frac{1}{4}x$.</p><p><strong>в)</strong> Исходное уравнение: $\sqrt{y^2 - 2x^2y + x^4} = x^2 - y$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot x^2 + (x^2)^2 = (y - x^2)^2$. Уравнение принимает вид: $\sqrt{(y - x^2)^2} = x^2 - y$. Преобразуем правую часть: $x^2 - y = -(y - x^2)$. Применяя свойство $\sqrt{a^2} = |a|$, получаем: $|y - x^2| = -(y - x^2)$. Равенство вида $|z| = -z$ справедливо, когда $z \le 0$. Следовательно, решением является неравенство $y - x^2 \le 0$. Выразим $y$: $y \le x^2$. Множество решений — это все точки координатной плоскости, лежащие на параболе $y = x^2$ или ниже неё.<br>Ответ: Множество решений — это область, заданная неравенством $y \le x^2$, то есть все точки, расположенные на параболе $y=x^2$ и ниже нее.</p><p><strong>г)</strong> Исходное уравнение: $\sqrt{y^2 - x^2y + \frac{1}{4}x^4} = y - \frac{1}{2}x^2$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot (\frac{1}{2}x^2) + (\frac{1}{2}x^2)^2 = (y - \frac{1}{2}x^2)^2$. Уравнение принимает вид: $\sqrt{(y - \frac{1}{2}x^2)^2} = y - \frac{1}{2}x^2$. Используя свойство $\sqrt{a^2} = |a|$, получаем: $|y - \frac{1}{2}x^2| = y - \frac{1}{2}x^2$. Равенство вида $|z| = z$ справедливо, когда $z \ge 0$. Следовательно, решением является неравенство $y - \frac{1}{2}x^2 \ge 0$. Выразим $y$: $y \ge \frac{1}{2}x^2$. Множество решений — это все точки координатной плоскости, лежащие на параболе $y = \frac{1}{2}x^2$ или выше неё.<br>Ответ: Множество решений — это область, заданная неравенством $y \ge \frac{1}{2}x^2$, то есть все точки, расположенные на параболе $y=\frac{1}{2}x^2$ и выше нее.</p>"
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            "id" => 1553738
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "edition" => Illuminate\Database\Eloquent\Collection {#1183}
            "task" => array:2 [
              "refs" => "1107835"
              "type" => "task"
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            "text" => "<p><strong>а)</strong> Исходное уравнение: $\sqrt{y^2 + \frac{2}{3}xy + \frac{1}{9}x^2} = y + \frac{1}{3}x$. Заметим, что выражение под знаком корня является полным квадратом суммы: $y^2 + 2 \cdot y \cdot (\frac{1}{3}x) + (\frac{1}{3}x)^2 = (y + \frac{1}{3}x)^2$. Подставив это в исходное уравнение, получаем: $\sqrt{(y + \frac{1}{3}x)^2} = y + \frac{1}{3}x$. Используя свойство арифметического квадратного корня $\sqrt{a^2} = |a|$, уравнение принимает вид: $|y + \frac{1}{3}x| = y + \frac{1}{3}x$. Равенство вида $|z| = z$ выполняется тогда и только тогда, когда выражение $z$ неотрицательно, то есть $z \ge 0$. В нашем случае $z = y + \frac{1}{3}x$, следовательно, решением является неравенство $y + \frac{1}{3}x \ge 0$. Выразим $y$: $y \ge -\frac{1}{3}x$. Множество пар чисел $(x; y)$, являющихся решениями уравнения, — это все точки координатной плоскости, лежащие на прямой $y = -\frac{1}{3}x$ и выше неё. Графически это замкнутая полуплоскость.<br>Ответ: Множеством решений является замкнутая полуплоскость, заданная неравенством $y \ge -\frac{1}{3}x$.</p><p><strong>б)</strong> Исходное уравнение: $\sqrt{y^2 - \frac{1}{2}xy + \frac{1}{16}x^2} = -y + \frac{1}{4}x$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot (\frac{1}{4}x) + (\frac{1}{4}x)^2 = (y - \frac{1}{4}x)^2$. Тогда уравнение можно переписать в виде: $\sqrt{(y - \frac{1}{4}x)^2} = -y + \frac{1}{4}x$. Преобразуем правую часть уравнения: $-y + \frac{1}{4}x = -(y - \frac{1}{4}x)$. Используя свойство $\sqrt{a^2} = |a|$, получаем: $|y - \frac{1}{4}x| = -(y - \frac{1}{4}x)$. Равенство вида $|z| = -z$ выполняется тогда и только тогда, когда выражение $z$ неположительно, то есть $z \le 0$. В нашем случае $z = y - \frac{1}{4}x$, следовательно, решением является неравенство $y - \frac{1}{4}x \le 0$. Выразим $y$: $y \le \frac{1}{4}x$. Множество решений — это все точки координатной плоскости, лежащие на прямой $y = \frac{1}{4}x$ и ниже неё. Графически это замкнутая полуплоскость.<br>Ответ: Множеством решений является замкнутая полуплоскость, заданная неравенством $y \le \frac{1}{4}x$.</p><p><strong>в)</strong> Исходное уравнение: $\sqrt{y^2 - 2x^2y + x^4} = x^2 - y$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot x^2 + (x^2)^2 = (y - x^2)^2$. Уравнение принимает вид: $\sqrt{(y - x^2)^2} = x^2 - y$. Преобразуем правую часть: $x^2 - y = -(y - x^2)$. Применяя свойство $\sqrt{a^2} = |a|$, получаем: $|y - x^2| = -(y - x^2)$. Равенство вида $|z| = -z$ справедливо, когда $z \le 0$. Следовательно, решением является неравенство $y - x^2 \le 0$. Выразим $y$: $y \le x^2$. Множество решений — это все точки координатной плоскости, лежащие на параболе $y = x^2$ или ниже неё.<br>Ответ: Множество решений — это область, заданная неравенством $y \le x^2$, то есть все точки, расположенные на параболе $y=x^2$ и ниже нее.</p><p><strong>г)</strong> Исходное уравнение: $\sqrt{y^2 - x^2y + \frac{1}{4}x^4} = y - \frac{1}{2}x^2$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot (\frac{1}{2}x^2) + (\frac{1}{2}x^2)^2 = (y - \frac{1}{2}x^2)^2$. Уравнение принимает вид: $\sqrt{(y - \frac{1}{2}x^2)^2} = y - \frac{1}{2}x^2$. Используя свойство $\sqrt{a^2} = |a|$, получаем: $|y - \frac{1}{2}x^2| = y - \frac{1}{2}x^2$. Равенство вида $|z| = z$ справедливо, когда $z \ge 0$. Следовательно, решением является неравенство $y - \frac{1}{2}x^2 \ge 0$. Выразим $y$: $y \ge \frac{1}{2}x^2$. Множество решений — это все точки координатной плоскости, лежащие на параболе $y = \frac{1}{2}x^2$ или выше неё.<br>Ответ: Множество решений — это область, заданная неравенством $y \ge \frac{1}{2}x^2$, то есть все точки, расположенные на параболе $y=\frac{1}{2}x^2$ и выше нее.</p>"
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            "created_at" => "2026-04-10 13:58:26"
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            "field_subject" => Illuminate\Database\Eloquent\Collection {#1141
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                  #connection: "mysql"
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                    "created_at" => "2026-04-10 13:58:26"
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                    "name" => "9"
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              #items: array:1 [
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                  #connection: "mysql"
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                    "created_at" => "2026-04-10 13:58:26"
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                    "name" => "Кокшетау"
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                    "field_cases" => array:6 [ …6]
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                }
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            "field_author" => Illuminate\Database\Eloquent\Collection {#1142
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                0 => App\Models\Term {#1143
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                  #table: "terms"
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                  #keyType: "int"
                  +incrementing: false
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                  #attributes: array:12 [
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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                    "field_foreign_lang_patronymic" => null
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                    "field_surname_rp" => null
                  ]
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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                    0 => "*"
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                }
                1 => App\Models\Term {#1149
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
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                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
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                  #attributes: array:12 [
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                    "created_at" => "2026-04-10 13:58:26"
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                    "field_name" => "Алла"
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                  ]
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                    "created_at" => "2026-04-10 13:58:26"
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                    0 => "*"
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                }
                2 => App\Models\Term {#1147
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
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                    "id" => 7005
                    "created_at" => "2026-04-10 13:58:26"
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                    "name" => "Жумадилова"
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                    "field_foreign_lang_patronymic" => null
                    "field_foreign_lang_surname" => null
                    "field_name" => "Аманбала"
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                  ]
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                    0 => "*"
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              ]
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            }
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              #items: []
              #escapeWhenCastingToString: false
            }
            "field_book_type" => Illuminate\Database\Eloquent\Collection {#1156
              #items: array:1 [
                0 => App\Models\Term {#1152
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
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                  #withCount: []
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                  #perPage: 15
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                    "id" => 6671
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Учебник"
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                    "field_cases" => array:6 [ …6]
                    "field_plural_form" => null
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                    "updated_at" => null
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                    "field_cases" => array:6 [ …6]
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            }
            "field_country" => Illuminate\Database\Eloquent\Collection {#1150
              #items: array:1 [
                0 => App\Models\Term {#1153
                  #connection: "mysql"
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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                    "field_translit" => "kazakhstan"
                  ]
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                    "created_at" => "2026-04-10 13:58:26"
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              ]
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            "field_city" => Illuminate\Database\Eloquent\Collection {#1151
              #items: array:1 [
                0 => App\Models\Term {#1181
                  #connection: "mysql"
                  #table: "terms"
                  #primaryKey: "id"
                  #keyType: "int"
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                  #attributes: array:6 [
                    "id" => 6995
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "name" => "Алматы"
                    "field_cases" => array:6 [ …6]
                    "field_translit" => "almaty"
                  ]
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                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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                    "field_translit" => "almaty"
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              ]
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            "field_series" => Illuminate\Database\Eloquent\Collection {#1182
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_umk" => Illuminate\Database\Eloquent\Collection {#1184
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1185
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1186
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_publication_number" => null
            "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1187
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              #escapeWhenCastingToString: false
            }
            "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1188
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              #escapeWhenCastingToString: false
            }
            "field_under_the_edition_degree" => null
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            "field_part" => ""
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            "field_second_foreign_language" => null
            "field_for_whom" => "Учебник для учащихся 9 класса общеобразовательных школ"
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            "field_tasks_count" => "1291"
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              0 => "/media/algebra_09/soltan-u19/covers/cover1.webp?ts=1752140452"
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                "width" => "1940"
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              ]
            ]
            "field_popular_book" => null
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              #escapeWhenCastingToString: false
            }
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              #escapeWhenCastingToString: false
            }
            "field_old_book" => Illuminate\Database\Eloquent\Collection {#1191
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_url" => "/9-klass/algebra/kokshetau-soltan-uchebnik"
            "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1192
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            "field_subject" => Illuminate\Database\Eloquent\Collection {#1141}
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            "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1154}
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            "field_city" => Illuminate\Database\Eloquent\Collection {#1151}
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            "field_umk" => Illuminate\Database\Eloquent\Collection {#1184}
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            "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1186}
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            "field_for_whom" => "Учебник для учащихся 9 класса общеобразовательных школ"
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              0 => "/media/algebra_09/soltan-u19/covers/cover1.webp?ts=1752140452"
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            "field_cover_alts" => array:1 [
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      ]
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    }
    "page" => Illuminate\Database\Eloquent\Collection {#1200
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        0 => App\Models\BookPage {#1199
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          #primaryKey: "id"
          #keyType: "int"
          +incrementing: true
          #with: []
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          #attributes: array:21 [
            "id" => 1097786
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
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            "field_display_title" => "44"
            "field_folder" => "folder1"
            "field_image_name" => "44"
            "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1201
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_weight" => "0"
            "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1202
              #items: array:1 [
                0 => App\Models\Book {#1155}
              ]
              #escapeWhenCastingToString: false
            }
            "field_metatags_title" => null
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            "edition_groups" => Illuminate\Database\Eloquent\Collection {#1203
              #items: []
              #escapeWhenCastingToString: false
            }
            "content" => Illuminate\Database\Eloquent\Collection {#1213
              #items: array:1 [
                0 => App\Models\Element {#1212
                  #connection: "mysql"
                  #table: "elements"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
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                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:6 [
                    "id" => 1260937
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1214 …2}
                    "book_page" => array:2 [ …2]
                    "img" => array:1 [ …1]
                  ]
                  #original: array:6 [
                    "id" => 1260937
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "edition" => Illuminate\Database\Eloquent\Collection {#1214 …2}
                    "book_page" => array:2 [ …2]
                    "img" => array:1 [ …1]
                  ]
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                    0 => "*"
                  ]
                }
              ]
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            }
            "next" => array:2 [
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              "type" => "book_page"
            ]
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              "refs" => "1097785"
              "type" => "book_page"
            ]
            "tasks" => Illuminate\Database\Eloquent\Collection {#1369
              #items: array:7 [
                0 => App\Models\Task {#1383
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
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                  #perPage: 15
                  +exists: true
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                  #escapeWhenCastingToString: false
                  #attributes: array:24 [
                    "id" => 1107830
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_page_start" => "44"
                    "field_page_end" => null
                    "field_url" => "/9-klass/algebra/kokshetau-soltan-uchebnik/1-132"
                    "field_display_title" => "132"
                    "field_outside_task" => null
                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1384 …2}
                    "field_metatags_title" => null
                    "field_metatags_description" => null
                    "field_h1" => null
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                    "field_description_bottom" => null
                    "field_match" => null
                    "breadcrumbs" => []
                    "edition_groups" => Illuminate\Database\Eloquent\Collection {#1385 …2}
                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1386 …2}
                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1387 …2}
                    "content" => Illuminate\Database\Eloquent\Collection {#1397 …2}
                    "next" => array:2 [ …2]
                    "previous" => array:2 [ …2]
                    "book" => Illuminate\Database\Eloquent\Collection {#1404 …2}
                    "page" => array:2 [ …2]
                  ]
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№137 (с. 44)
Условие. №137 (с. 44)
скриншот условия
Алгебра, 9 класс Учебник, авторы: Солтан Генадий Николаевич, Солтан Алла Евгеньевна, Жумадилова Аманбала Жумадиловна, издательство Кокшетау, Алматы, 2019, страница 44, номер 137, Условие

137. Изобразите множество пар чисел (x; y), являющихся решениями уравнения:

a) $\sqrt{y^2 + \frac{2}{3}xy + \frac{1}{9}x^2} = y + \frac{1}{3}x;$

в) $\sqrt{y^2 - 2x^2y + x^4} = x^2 - y;$

б) $\sqrt{y^2 - \frac{1}{2}xy + \frac{1}{16}x^2} = -y + \frac{1}{4}x;$

г) $\sqrt{y^2 - x^2y + \frac{1}{4}x^4} = y - \frac{1}{2}x^2.$

Решение. №137 (с. 44)
Алгебра, 9 класс Учебник, авторы: Солтан Генадий Николаевич, Солтан Алла Евгеньевна, Жумадилова Аманбала Жумадиловна, издательство Кокшетау, Алматы, 2019, страница 44, номер 137, Решение
Решение 2 (rus). №137 (с. 44)

а) Исходное уравнение: $\sqrt{y^2 + \frac{2}{3}xy + \frac{1}{9}x^2} = y + \frac{1}{3}x$. Заметим, что выражение под знаком корня является полным квадратом суммы: $y^2 + 2 \cdot y \cdot (\frac{1}{3}x) + (\frac{1}{3}x)^2 = (y + \frac{1}{3}x)^2$. Подставив это в исходное уравнение, получаем: $\sqrt{(y + \frac{1}{3}x)^2} = y + \frac{1}{3}x$. Используя свойство арифметического квадратного корня $\sqrt{a^2} = |a|$, уравнение принимает вид: $|y + \frac{1}{3}x| = y + \frac{1}{3}x$. Равенство вида $|z| = z$ выполняется тогда и только тогда, когда выражение $z$ неотрицательно, то есть $z \ge 0$. В нашем случае $z = y + \frac{1}{3}x$, следовательно, решением является неравенство $y + \frac{1}{3}x \ge 0$. Выразим $y$: $y \ge -\frac{1}{3}x$. Множество пар чисел $(x; y)$, являющихся решениями уравнения, — это все точки координатной плоскости, лежащие на прямой $y = -\frac{1}{3}x$ и выше неё. Графически это замкнутая полуплоскость.
Ответ: Множеством решений является замкнутая полуплоскость, заданная неравенством $y \ge -\frac{1}{3}x$.

б) Исходное уравнение: $\sqrt{y^2 - \frac{1}{2}xy + \frac{1}{16}x^2} = -y + \frac{1}{4}x$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot (\frac{1}{4}x) + (\frac{1}{4}x)^2 = (y - \frac{1}{4}x)^2$. Тогда уравнение можно переписать в виде: $\sqrt{(y - \frac{1}{4}x)^2} = -y + \frac{1}{4}x$. Преобразуем правую часть уравнения: $-y + \frac{1}{4}x = -(y - \frac{1}{4}x)$. Используя свойство $\sqrt{a^2} = |a|$, получаем: $|y - \frac{1}{4}x| = -(y - \frac{1}{4}x)$. Равенство вида $|z| = -z$ выполняется тогда и только тогда, когда выражение $z$ неположительно, то есть $z \le 0$. В нашем случае $z = y - \frac{1}{4}x$, следовательно, решением является неравенство $y - \frac{1}{4}x \le 0$. Выразим $y$: $y \le \frac{1}{4}x$. Множество решений — это все точки координатной плоскости, лежащие на прямой $y = \frac{1}{4}x$ и ниже неё. Графически это замкнутая полуплоскость.
Ответ: Множеством решений является замкнутая полуплоскость, заданная неравенством $y \le \frac{1}{4}x$.

в) Исходное уравнение: $\sqrt{y^2 - 2x^2y + x^4} = x^2 - y$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot x^2 + (x^2)^2 = (y - x^2)^2$. Уравнение принимает вид: $\sqrt{(y - x^2)^2} = x^2 - y$. Преобразуем правую часть: $x^2 - y = -(y - x^2)$. Применяя свойство $\sqrt{a^2} = |a|$, получаем: $|y - x^2| = -(y - x^2)$. Равенство вида $|z| = -z$ справедливо, когда $z \le 0$. Следовательно, решением является неравенство $y - x^2 \le 0$. Выразим $y$: $y \le x^2$. Множество решений — это все точки координатной плоскости, лежащие на параболе $y = x^2$ или ниже неё.
Ответ: Множество решений — это область, заданная неравенством $y \le x^2$, то есть все точки, расположенные на параболе $y=x^2$ и ниже нее.

г) Исходное уравнение: $\sqrt{y^2 - x^2y + \frac{1}{4}x^4} = y - \frac{1}{2}x^2$. Выражение под корнем является полным квадратом разности: $y^2 - 2 \cdot y \cdot (\frac{1}{2}x^2) + (\frac{1}{2}x^2)^2 = (y - \frac{1}{2}x^2)^2$. Уравнение принимает вид: $\sqrt{(y - \frac{1}{2}x^2)^2} = y - \frac{1}{2}x^2$. Используя свойство $\sqrt{a^2} = |a|$, получаем: $|y - \frac{1}{2}x^2| = y - \frac{1}{2}x^2$. Равенство вида $|z| = z$ справедливо, когда $z \ge 0$. Следовательно, решением является неравенство $y - \frac{1}{2}x^2 \ge 0$. Выразим $y$: $y \ge \frac{1}{2}x^2$. Множество решений — это все точки координатной плоскости, лежащие на параболе $y = \frac{1}{2}x^2$ или выше неё.
Ответ: Множество решений — это область, заданная неравенством $y \ge \frac{1}{2}x^2$, то есть все точки, расположенные на параболе $y=\frac{1}{2}x^2$ и выше нее.

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