Question

Решите уравнение x^3-3x^2-36x+108=0

Answer 1

(x^3 -3x²) -36(x -3) =0
x²(x -3) -36(x -3) =0
(x -3)(x² -36) =0
x -3 =0, x =3
x² -36 =0, (x -6)(x +6) =0
x -6 =0, x =6
x +6 =0, x = -6
ответ: x= -6, x =3, x =6