2mn/4m^2-9与2m-3/2m+3怎么通分

分类: 作业答案 • 2023-01-11 21:42:43

问题描述：

答

2mn/4m^2-9=2mn/[(2m+3)(2m-3)]
2m-3/2m+3=(2m-3)(2m-3)/[(2m+3)(2m-3)]=(2m-3)²/[(2m+3)(2m-3)]