计算xyx2-2xy+y2•x2-y2xy2-x2y,其结果为()A.1y-xB.1x-yC.x+y(x-y)2D.-x+y(x-y)2-数学

题目简介

计算xyx2-2xy+y2•x2-y2xy2-x2y,其结果为()A.1y-xB.1x-yC.x+y(x-y)2D.-x+y(x-y)2-数学

题目详情

计算,其结果为(  )
A.B.C.D.-
题型:单选题难度:中档来源:不详

答案

D

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