x²-y²+2y-1是多少,
来源：学生学帮网 编辑：学帮网 时间：2024/06/06 05:07:04
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)
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)