x2-2xy+y2-1/x-y-1
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/19 17:57:21
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
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来源:学生作业帮助网 编辑:作业帮 时间:2024/05/19 17:57:21
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