6(x+2)/(x+2)²+x²/(x+2)(x-2)=(x+2)(x-2)/(x-2)²6/(x+2)+x²/(x+2)(x-2)=(x+2)/(x-2)两边乘(x+2)(x-2)6x-12+x²=x²+4x+46x-12=4x+4x=8经检验,x=8是方程的解