因式分解(3x+3m)2-(x-y)2
问题描述:
因式分解(3x+3m)2-(x-y)2
答
(3x+3m)²-(x-y)²
=(3x+3m-x+y)(3x+3m+x-y)
=(2x+3m+y)(4x+3m-y)