(4x-2)/(x+2)(x-2)+1/(x-2)=3
两边乘(x+2)(x-2)
4x-2+x+2=3x²-12
3x²-5x-12=0
(3x+4)(x-3)=0
x=-4/3,x=3
经检验,x=-4/3和x=3是方程的解