(x+y)的平方+2x+2y因式分解

问题描述:

(x+y)的平方+2x+2y因式分解
要带讲解的

(x+y)²+2x+2y
=(x+y)²+2(x+y)
=(x+y)[(x+y)+2]
=(x+y)(x+y+2)