Решите (x+3)^3 - (x+3)^2*x+3(x+3)=0

(x + 3)³ - (x + 3)² • x + 3(x + 3) = 0
(x + 3) • ((x + 4)² - (x + 3) • x + 3) = 0
(x + 3) • ((x + 3)² - (x + 3x) + 3) = 0
(x + 3) • ((x + 3)² - x² - 3x + 3) = 0
x + 3 = 0
(x + 3)² - x² - 3x + 3 = 0
x1 = -4
x2 = -3