作业帮x^2-y^2/x^2-2xy+y^2其中x^2+y^2-2x-6y+10=0
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x^2-y^2/x^2-2xy+y^2其中x^2+y^2-2x-6y+10=0
x^2-y^2/x^2-2xy+y^2其中x^2+y^2-2x-6y+10=0
x^2-y^2/x^2-2xy+y^2其中x^2+y^2-2x-6y+10=0
x^2+y^2-2x-6y+10=0 得(x-1)²+(y-3)²=0∴x=1,y=3.x^2-y^2/x^2-2xy+y^2=(x+y)(x-y)/(x-y)²=（x+y）/(x-y)=-2
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