Thanks for the help

Enter (A,B,C) in order below if A, B, and C are the coefficients of the partial fractions expansion of 

$\frac{2(x^2+x-1)}{x(x^2-1)} = \frac{A}{x} + \frac{B}{x-1} + \frac{C}{x+1}$

see link: https://web2.0calc.com/questions/a-b-c_1