Question

Дам 20 баллов! Помогите решить уравеение!
x+2-x^3-2x^2=0

Answer 1

x + 2 - x^3 - 2 x^2 = 0
x + 2 = x^2(x+2)
-(x - 1) (x + 1) (x + 2) = 0
-(x + 2/3)^3 + 7/3 (x + 2/3) + 20/27 = 0
x = -2
x = -1
x = 1