问题描述: 化简:[(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)] 1个回答 分类: 数学 2014-10-28 问题解答: 我来补答 [(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)]=(x√x+x√y)/(xy-y^2)-[x+√(xy)+y]/(x√x-y√y)=[x(√x+√y)/[y(√x-√y)(√x+√y)]-[x+√(xy)+y]/{(√x-√y)[x+√(xy)+y]}=x/[y(√x-√y)]-1/(√x-√y)=(x-y)/[y(√x-√y)]=(√x-√y)(√x+√y)/[y(√x-√y)]=(√x+√y)/y 展开全文阅读