Factor completely: x2−16x^2 - 16x2−16.
(x+4)2(x+4)^2(x+4)2
(x−4)2(x-4)^2(x−4)2
(x−4)(x+4)(x-4)(x+4)(x−4)(x+4)
(x−8)(x+2)(x-8)(x+2)(x−8)(x+2)