(16x^4 +1)(4x^2 +1)(2x+1)(1-2x)

问题描述:

(16x^4 +1)(4x^2 +1)(2x+1)(1-2x)

(16x^4 +1)(4x^2 +1)(2x+1)(1-2x)
=(16x^4 +1)(4x^2 +1)(1-4x^2)
=(16x^4 +1)(1-16x^4)
=1-256x^8