因式分解xy+x-y-1
问题描述:
因式分解xy+x-y-1
答
原式=x(y+1)-y-1
=x(y+1)-(y+1)
=(x-1)(y+1)
因式分解xy+x-y-1
原式=x(y+1)-y-1
=x(y+1)-(y+1)
=(x-1)(y+1)