问题描述: 化简:1/x^2-3x+2+1/x^2-x +1/x^2+x+1/x^2+3x+2 1个回答 分类:数学 2014-10-22 问题解答: 我来补答 1/x^2-3x+2+1/x^2-x +1/x^2+x+1/x^2+3x+2=1/(x-2)(x-1)+1/x(x-1)+1/x(x+1)+1/(x+2)(x+1)=(x+x-2)/x(x-2)(x-1)+(x+2+x)/x(x+1)(x+2)=2/x(x-2)+2/x(x+2)=(2x+4+2x-4)/x(x+2)(x-2)=4/(x+2)(x-2)=4/(x^2-4) 展开全文阅读