5xy^2-(3xy^2-(4xy^2-2x^2y))+2x^2y-xy^2求
问题描述:
5xy^2-(3xy^2-(4xy^2-2x^2y))+2x^2y-xy^2
求
答
5xy²-[3xy²-(4xy²-2x²y)]+2x²y-xy²=5xy²-(3xy²-4xy²+2x²y)+2x²y-xy²=5xy²-(-xy²+2x²y)+2x²y-xy²=5xy²+xy²-2x...