(x+2)/(x-1)- 3/(x+1)=6/(x^2-1)
(x+2)/(x-1) - 3/(x+1) = 6/(x^2-1) (3x + 6)/(x^2-1) = 6/(x^2-1) 3x + 6 = 6 3x = 0 x = 0 Ответ: 0.