化简:-(-7x3-2x2)-(-3x2+5x3)=______.-数学

题目简介

化简:-(-7x3-2x2)-(-3x2+5x3)=______.-数学

题目详情

化简:-(-7x3-2x2)-(-3x2+5x3)=______.
题型:填空题难度:中档来源:不详

答案

原式=7x3+2x2+3x2-5x3
=(7-5)x3+(2+3)x2
=2x3+5x2.
故答案为:2x3+5x2.

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