原式= -x/(x-2)+(x+2)(x-2)/(x+2)²
= -x/(x-2)+(x-2)/(x+2)
=(-x²-2x+x²-4x+4)/(x+2)(x-2)
=(-6x+4)/(x²-4)我这样写可不可以=-x/(x-2)+(x+2)(x-2)/(x+2)²=- x/(x-2)+(x-2)/(x+2)= -（x²+2x-x²+4x-4)/(x+2)(x-2)= -（6x-4)/(x²-4)错==- [x/(x-2)-(x-2)/(x+2)]= -（x²+2x-x²+4x-4)/(x+2)(x-2)= -（6x-4)/(x²-4)我改过来了哦，对了请采纳吧