Предмет: Алгебра, автор: yuulliiaaa

СРОЧНО ПОМОГИТЕ УМОЛЯЮ ПРОШУ!!!!! 50 Балов даю!!! Один із коренів рівняння x^2+px+12=0 дорівнює 1,5. Знайдіть коефіцієнт p і другий корінь рівняння​!!!​

Ответы

Автор ответа: unknownx0
1

Ответ:

a=8 и p=-9.5

Объяснение:

Теорема Виета

В квадратном уравнении x^2+px-q=0 корни x_1 и x_2. Тогда верны равенства

\displaystyle \left \{ {{x_1+x_2=-p} \atop {x_1\cdot x_2=q}} \right.

Запишем для нашего уравнения

x^2+px+12=0

Произведение корней 1.5 и a равно свободному члену 12

1.5\cdot a=12\\a=8

Мы нашли корень. Найдем p из суммы корней

1.5+8=-p\\p=-9.5

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