合并同类项(1)5xy2+2x2y-3xy2-x2y(2)-2x+5(x+2y)-(x-3y)-数学

题目简介

合并同类项(1)5xy2+2x2y-3xy2-x2y(2)-2x+5(x+2y)-(x-3y)-数学

题目详情

合并同类项
(1)5xy2+2x2y-3xy2-x2y                         (2)-2x+5(x+2y)-(x-3y)
题型:解答题难度:中档来源:不详

答案

(1)5xy2+2x2y-3xy2-x2y=5xy2-3xy2+2x2y-x2y=2xy2+x2y;   

(2)-2x+5(x+2y)-(x-3y)=-2x+5x+10y-x+3y=2x+13y.

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