x的2次方+2xy+y的2次方+x+y-2因式分解

问题描述:

x的2次方+2xy+y的2次方+x+y-2因式分解

答:
x的2次方+2xy+y的2次方+x+y-2
=x²+2xy+y²+(x+y)-2
=(x+y)²+(x+y)-2
=(x+y-1)(x+y+2)