x2-2xy+y2-1/x-y-1

来源：学生作业帮助网编辑：作业帮时间：2024/05/03 12:31:52

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