x²-y²+2y-1是多少,

来源：学生作业帮助网编辑：六六作业网时间：2024/05/16 19:15:19

x²-y²+2y-1是多少,x²-y²+2y-1是多少,x²-y²+2y-1是多少,x²-y²+2y-1=x²

x²-y²+2y-1是多少,
x²-y²+2y-1是多少,

x²-y²+2y-1是多少,
x²-y²+2y-1
=x²-(y²-2y+1)
=x²-(y-1)²
=(x+y-1)(x-y+1)
祝学习进步,望采纳,不懂的欢迎追问...

x²-y²+2y-1=x²-(y²-2y+1)=x²-(y-1）²=(x+y-1)(x-y+1)