Срочно!! 1) √-х=2 2) х^2+4х=0

Ответ:

\sqrt{ - x} = 2 \\ - x = {2}^{2} \\ - x = 4 \\ x = - 4

{x}^{2} + 4x = 0 \\ x(x + 4) = 0 \\ x1 = 0 \\ x2 = - 4