各项分别乘(x+1)(x-1)得,x(x-1)-(x+1)=(x+1)(x-1)得,x^2-x-x-1=x^2-1解得 x=0希望能帮到你。
通分 [x(x-1)-(x+1)] / (x-1)·(x+1)=1则 x(x-1)-(x+1)=(x-1)·(x+1)x² -2x -1 = x² -1-2x =0则 x =0经检验,适合