Question

Срочно

1)-4x=7x^2

2)X²+x=90

Answer 1

$1) - 4x - 7 {x}^{2} = 0 \ x( - 4 - 7x) = 0 \ x = 0$

$- 4 - 7x = 0 \ 7x = - 4 \ x = - frac{4}{7}$

$2)x(x + 1) = 90 \ x = 0 \ x + 1 = 90 \ x = 90 - 1 \ x = 89$