问题描述： 2x/5x-3除以3/25x平方-9*x/5x+3呵呵、说一下 1个回答 分类：数学 2014-09-27 问题解答： 我来补答 2x/5x-3除以3/25x平方-9*x/5x+3=[2x/(5x-3)]÷[3/(25x^2-9)]×[x/(5x+3)]=[2x/(5x-3)]÷[3/(5x+3)(5x-3)]×[x/(5x+3)]=[2x/(5x-3)]×[(5x+3)(5x-3)/3]×[x/(5x+3)]=2x^2/3 展开全文阅读
