1) y² - 5y = 0
y(y - 5) = 0
y = 0,
y - 5 =0, y = 5
Ответ: 0; 5.
2) x² + 4x = 0
x(x + 4) = 0
x = 0,
x + 4 = 0, x = -4
Ответ: -4; 0.
3) 12x² - x = 0
x(12x - 1) = 0
x = 0
12x - 1 = 0, 12x = 1, x = 1/12
Ответ: 0; 1/12.
4) 8x² + 6x = 0
2x(4x + 3) = 0
2x = 0, x = 0
4x + 3 = 0, 4x = -3, x = -3/4
Ответ: -3/4; 0.