问题描述: 先化简再求值[[(x2+2x+1)/(x+2)]÷[(x2-1)/(x-1)]-x/(x+2)其中x=√3-2 1个回答 分类:数学 2014-12-09 问题解答: 我来补答 原式=(x+1)²/(x+2)÷(x+1)(x-1)/(x-1)-x/(x+2)=(x+1)²/(x+2)÷(x+1)-x/(x+2)=(x+1)/(x+2)-x/(x+2)=(x+1-x)/(x+2)=1/(x+2)=1/(√3-2+2)=√3/3 展开全文阅读