问题描述: 计算:x²/x-5+25/5-x=1/x-1/x-1= 1个回答 分类:数学 2014-12-05 问题解答: 我来补答 x²/(x-5)+25/(5-x)=x²/(x-5) - 25/(x-5)=(x²-25)/(x-5)=(x+5)(x-5)/(x-5)=x+51/x-1/(x-1)=[(x-1)-x]/[x(x-1)]=-1/[x(x-1)] 展开全文阅读