(x²-1-x²+4)=2x+a
2x=3-a
x=(3-a)/23
[(x-1)/(x-2)] -[ (x-2)/(x+1)]=(2x+a)/(x-2)(x+1)
(x²-1-x²+4x-4=2x+a
2x=a+5
x=2/a+5
我误为平方差了2x=a+5x=(a+5)/2<0a<-5
[(x-1)/(x-2)] -[ (x-2)/(x+1)]=(2x+a)/(x-2)(x+1)
(x²-1-x²+4x-4=2x+a
2x=a+5
x=2/a+5
我误为平方差了2x=a+5x=(a+5)/2<0a<-5