Question

9х = -х2-18. Помогите пж​

Answer 1

Ответ:

$\Оtvet : x _1 = - 6 \: \: \: \: \: x_2 = - 3$

Объяснение:

$9x = - {x}^{2} - 18 \\ 9x + {x}^{2} + 18 = 0 \\ {x}^{2} + 6x + 3x + 18 = 0 \\ x(x + 6) + 3(x + 6) = 0 \\ (x + 6)(x + 3) = 0 \\ \\ x + 6 = 0 \\ x + 3 = 0 \\ \\ x = - 6 \\ x = - 3$