Решить уравнение: (х + 3)^3 + 3·(х + 3) = х·(х + 3)^2 !

(х + 3)^3 + 3·(х + 3) = х·(х + 3)^2 (x+3)[(x+3)^2 + 3] = x(x+3)^2
(x+3)^2 + 3 = x(x+3)
x^2 + 6x + 9 + 3 = x^2 + 3x
x^2 + 6x  - x^2 - 3x=  - 9 - 3
3x = -12
x=-4