设(x²-1)/(x²+2x)=t则8t+3/t=118t²-11t+3=0(8t-3)(t-1)=0解得t=3/8 或t=11.t=3/8 (x²-1)/(x²+2x)=3/85x²-6x-8=0(5x+4)(x-2)=0解得x1=-4/5 x2=22.t=1 (x²-1)/(x²+2x)=12x=-1...