Factor: x2+6x+9x^2 + 6x + 9x2+6x+9.
(x+3)2(x+3)^2(x+3)2
(x+9)(x+1)(x+9)(x+1)(x+9)(x+1)
(x−3)2(x-3)^2(x−3)2
(x+3)(x−3)(x+3)(x-3)(x+3)(x−3)