x2-2xy+y2-1/x-y-1
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/21 03:29:27
![x2-2xy+y2-1/x-y-1](/uploads/image/z/5261857-25-7.jpg?t=x2-2xy%2By2-1%2Fx-y-1)
x2-2xy+y2-1/x-y-1
x2-2xy+y2-1/x-y-1
x2-2xy+y2-1/x-y-1
x2-2xy+y2-1/x-y-1
=【(x-y)²-1】/(x-y-1)
=(x-y-1)(x-y+1)/(x-y-1)
=x-y+1
x2-2xy+y2-1/x-y-1=[(x-y)^2-1]/(x-y-1)=[(x-y+1)(x-y-1)]/(x-y-1)=x-y+1