Question

х^2=-4x-3 ....................

Answer 1

$x^{2} =-4x-3$

$x^{2} +4x+3 = 0$

$D = 16 - 12 = 4 = 2^{2}$

$x_1 = \frac{-4+2}{2} =\frac{-2}{2} =-1$

$x_2= \frac{-4-2}{2} =\frac{-6}{2} =-3$

Ответ : -3 ; -1