计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]

分类: 作业答案 • 2021-12-29 14:32:44

问题描述：

计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]
急

答

4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]}=4xy²-3x²y-3x²y+[2xy²-4x²y+2(x²y-2xy²)】=4xy²-6x²y+2xy²-4x²y+2(x²...