计算:(xy-x2)÷xy分之x2-2xy+y2
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计算:(xy-x2)÷xy分之x2-2xy+y2
计算:(xy-x2)÷xy分之x2-2xy+y2
计算:(xy-x2)÷xy分之x2-2xy+y2
(xy-x2)÷xy分之x2-2xy+y2
=(xy-x²)÷(x-y)²/xy
=x(y-x)*xy/(y-x)²
=x²y/(y-x)³
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