x=2+根号3分之1x=(2-根号3)x-1分之2+x平方-1分之2-x除以x平方-2x-3分之x平方-4x+4=2/(x-1)+(2-x)/(x^2-1) / ((x-2)^2/(x-3)(x+1))=2/(x-1)-(x-2)/(x-1)(x+1) * ((x-3)(x+1)/(x-2)^2)=2/(x-1)- (x-3)/(x-2)(x-1)=(2(x...