Factor x3+27x^3 + 27x3+27.
(x+3)(x2−3x+9)(x + 3)(x^2 - 3x + 9)(x+3)(x2−3x+9)
(x+3)3(x + 3)^3(x+3)3
(x+3)(x2+3x+9)(x + 3)(x^2 + 3x + 9)(x+3)(x2+3x+9)
(x−3)(x2+3x+9)(x - 3)(x^2 + 3x + 9)(x−3)(x2+3x+9)