(2x/x-5)-(2/2x+5)=1 日期:2013-12-23 17:23:16 人气:1 (2x/x-5)-(2/2x+5)=1 2x/x-5)-(2/2x+5)=1 2x(2x+5)-2(x-5)=(2x+5)x(x-5) 2x²+13x+35=0