5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2 化简,再求值

分类: 作业答案 • 2021-12-29 14:48:13

问题描述：

答

5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2
=5xy2-3xy2+4xy2-2x2y-2x2y+2x2y-xy2
=5xy²-2x²y