Factor x4−8x2+16x^4 - 8x^2 + 16x4−8x2+16.
(x2−2)2(x^2 - 2)^2(x2−2)2
(x2−4)(x2+4)(x^2 - 4)(x^2 + 4)(x2−4)(x2+4)
(x2−4)2=(x−2)2(x+2)2(x^2 - 4)^2 = (x-2)^2(x+2)^2(x2−4)2=(x−2)2(x+2)2
(x−4)(x+4)(x - 4)(x + 4)(x−4)(x+4)