Question

Решите данное уравнение

Answer 1

x^3 + 7x^2 - 4x - 28 = 0
x^2*(x + 7) - 4(x + 7) = 0
(x + 7)(x^2 - 4) = 0
(x + 7)(x + 2)(x - 2) = 0
x1 = -7; x2 = -2; x3 = 2

Answer 2

х^2(x+7)=4(x+7)
x^2=4
x=2  x=-2