2x/2x方-x-1 + 3/1-x=-1
2x/(2x+1)(x-1) -3/(x-1)=-1
两边同乘以(2x+1)(x-1),得
2x-3(2x+1)=-(2x+1)(x-1)
2x-6x-3=-2x平方+x+1
2x平方-5x-4=0
x=(5±√(25+32))/4
=(5±√57)/4
经检验是方程的根.