Question

(Фото) Поможіть будь ласка

Answer 1

1) - В)

$3 {x}^{2} - 9x = 0 \\ 3x(x - 3) = 0 \\ 3x = 0 \\ x = 0 \\ \\ x - 3 = 0 \\ x = 3$

2) - A)

${2x}^{3} - 50x = 0 \\ 2x( {x}^{2} - 25) = 0 \\ 2x(x - 5)(x + 5) = 0 \\ 2x = 0 \\ x = 0 \\ \\ x - 5 = 0 \\ x = 5 \\ \\ x + 5 = 0 \\ x = - 5$

3) - Б)

$- 5x + 8 = 3x + 48 \\ - 5x - 3x = 48 - 8 \\ - 8x = 40 \\ x = - 5$