(x-2)/(x+2)-1=3/(x^2-4)(x-2)^2-(x^2-4)-3=0-4x+4+4-3=0x=5/4代入原方程验证，x=5/4是原方程的根
(x-2)/(x+2)-1=3/(x²-4)(x-2）²-(x²4)-3=0-4x+4+4-3=0-4x+5=0x=5/4
