合并同类项：x^2y^2+3xy-7x^2y^2-5/2xy-1+5x^2y^2=

分类: 作业答案 • 2023-01-11 00:17:42

问题描述：

答

x^2y^2+3xy-7x^2y^2-5/2xy-1+5x^2y^2
=(x^2y^2-7x^2y^2+5x^2y^2)+(3xy-5/2xy)-1
=-x^2y^2+1/2xy-1