因式分解(x+y)^4-16x^4
问题描述:
因式分解(x+y)^4-16x^4
答
(x+y)^4-16x^4
=[(x+y)^2-4x^2][(x+y)^2+4x^2]
=(x+y+2x)(x+y-2x)(5x^2+2xy+y^2)
=(3x+y)(y-x)(5x^2+2xy+y^2)