Question

Пожалуйста помогите

Answer 1

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

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

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

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