x2减1分之x2减2x 除于(x-1减 x+1分之2x-1)化简

来源:学生学帮网 编辑:学帮网 时间:2024/06/08 22:58:59

x2减1分之x2减2x 除于(x-1减 x+1分之2x-1)化简

原式=[(x²-2x)/(x²-1)]÷[(x-1)-(2x-1)/(x+1)]= [(x²-2x)/(x²-1)]÷[(x²-2x)/(x-1)]= [(x²-2x)/(x²-1)]×[(x-1)/ (x²-2x)]=1/(x+1)