计算:-5xy(x2-xy)+3xy-x2=______.-数学

题目简介

计算:-5xy(x2-xy)+3xy-x2=______.-数学

题目详情

计算:-5xy(x2-xy)+3xy-x2=______.
题型:填空题难度:偏易来源:不详

答案

-5xy(x2-xy)+3xy•x2
=-5x3y+5x2y2+3x3y
=5x2y2-2x3y.
故答案为:5x2y2-2x3y

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