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