Question

Пожалуйста помогите

Answer 1

$3x {}^{2} - 6x = 0 \ x(3x - 6) = 0 \ x = 0 : или : 3x - 6 = 0 \ x = 0 : или : 3x = 6 \ x = 0 : или : x = 2$

$2x + x {}^{2} = 0 \ x(2 + x) = 0 \ x = 0 : или : 2 + x = 0 \ x = 0 : или : x = - 2$

$4x {}^{2} - 25 = 0 \ 4x {}^{2} = 25 \ x {}^{2} = frac{25}{4} \ x1 = frac{5}{2} = 2.5 \ x2 = - frac{5}{2} = - 2.5$

$x {}^{2} - 16 = 0 \ x {}^{2} = 16 \ x1 = 4 \ x2 = - 4$