Question

x^3+3x^2-4x-12 пажалуйста

Answer 1

x^3 - 3x^2 - 4x + 12 = 0
x^2 * (x-3) - 4 * (x-3) = 0
(x-3) * (x^2 - 4) = 0
x1 = 3
x^2 - 4 = 0
x2 = 2
x3 = -2
Всё