已知x^2+y^2-2x-6y+10=0,求(x^2-y^2)/xy的值.
1个回答
x2+y2-2x-6y+10=0
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(x2-2x+1)+(y2-6y+9)=0
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(x-1)2+(y-3)2=0
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x=1 y=3
下面算一下就行了吧.
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