(-x2-y)2等于()A.-x2-2xy+y2B.-x4-2x2y+y2C.x4+2x2y+y2D.x4-2xy-y2-数学

题目简介

(-x2-y)2等于()A.-x2-2xy+y2B.-x4-2x2y+y2C.x4+2x2y+y2D.x4-2xy-y2-数学

题目详情

(-x2-y)2等于(  )
A.-x2-2xy+y2B.-x4-2x2y+y2
C.x4+2x2y+y2D.x4-2xy-y2
题型:单选题难度:中档来源:不详

答案

(-x2-y)2=x4+2x2y+y2
故选C.

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