Question

Xкуб-3x квадрат -4x +12 =0

Answer 1

х^3 -3x^2 - 4x - 12 = 0

x^2(x-3)- 4(x-3)=0

(x-3)(x^2 - 4) = 0

(x-3)(x-2)(x+2) = 0

x=3

x=2

x=-2

 Вроде так....