问题
填空题
将x2y-x2+3xy-2x+2y-1因式分解为______.
答案
原式=(x2y+3xy+2y)-(x2+2x+1)
=y(x+1)(x+2)-(x+1)2
=(x+1)(xy+2y-x-1).
故答案为:(x+1)(xy+2y-x-1).
将x2y-x2+3xy-2x+2y-1因式分解为______.
原式=(x2y+3xy+2y)-(x2+2x+1)
=y(x+1)(x+2)-(x+1)2
=(x+1)(xy+2y-x-1).
故答案为:(x+1)(xy+2y-x-1).