分解因式x2+2xy+y2+3x+3y-4=

问题描述:

分解因式x2+2xy+y2+3x+3y-4=

x2+2xy+y2+3x+3y-4
=﹙x+y﹚²+3﹙x+y﹚-4
=﹙x+y+4﹚﹙x+y-1﹚