(x-2)(x^2+4)(x^4+16)(x+2)

问题描述:

(x-2)(x^2+4)(x^4+16)(x+2)

(x-2)(x^2+4)(x^4+16)(x+2)
=[(x-2)(x+2)](x^2+4)(x^4+16)
=(x^2-4)(x^2+4)(x^4+16)
=(x^4-16)(x^4+16)
=(x^8-256)