计算:(xy-x²)乘 x-y分之xy

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计算:(xy-x²)乘 x-y分之xy

计算:(xy-x²)乘 x-y分之xy
计算:(xy-x²)乘 x-y分之xy

计算:(xy-x²)乘 x-y分之xy
(xy-x²)乘 (x-y)分之xy
=-x(x-y)乘 [(x-y)分之xy]
=-x²y