问题描述: (x-3/x^2+3x+2)*(x^2/x^2-4x+3),(x^2-1/x-1÷x^2-x/x^2-2x+1) 这两道题怎么算 1个回答 分类:数学 2014-10-07 问题解答: 我来补答 (x-3/x^2+3x+2)*(x^2/x^2-4x+3)=(x-3)/(x+2)(x+1)×x²/(x-3)(x-1)=x²/(x+2)(x+1)(x-1)怀疑本题是 (x-3/x^2+3x+2)*(x^2 -1 /x^2-4x+3),=(x-3)/(x+2)(x+1)×(x+1)(x-1)/(x-3)(x-1)=1/(x+2)(x^2-1/x-1÷x^2-x/x^2-2x+1) =(x+1)(x-1)/(x-1)×(x-1)²/x(x-1)=(x+1)×(x-1)/x=(x²-1)/x 展开全文阅读