(x+1)(x-1)分之（x-1)(x+3)有意义,则x的取值为

化简x-1分之x²+1-x分之x (x-2分之x-1)/2-x分之4x x-1分之x²+5x - x²-x分之2x²+4x x-1分之x² -x-1 x+1-(x-1分之x方) X(X-1)分之2X+1 5x-x分之1“ (x-1分之2x-x+1分之3x)除以x^2-1分之x (x-1分之2x - x+1分之x)×x分之x²-1= x-3分之x-x的平方-3x分之x+6+x分之1 (x平方-2x分之x+2-x平方-4x+4分之x-1)乘4-x分之x (x-2x分之x+2 - x-4x+4分之x-1)/x分之x-4 (x-(x+1分之2x))除以x^2-1分之x^2-2x+1 [x-(x+1分之2x)]÷x²-1分之x²-2x+1 x²-x分之x-1和x²+x分之x-1 通分 x方-2x+1分之x方-1+x-2分之x方-2x x^2-x+3分之1-2x,-x^2+x-3分之2x-1 x²-2x分之x+2-x²-4x+4分之x-1