решите уравнение (x+3)(x^2-3x+9)=x^3-3x​

(x + 3) (x^2 - 3 x + 9) = x^3 - 3 x

3 x + 27 = 0

x^3 + 27 = x (x^2 - 3)

(x + 3) (x^2 - 3 x + 9) = x (x^2 - 3)

x^3 + 27 = x^3 - 3 x

x = -9