SOLUTION:

 …….(i)

Comparing coefficients of  A + C = 0 …….(ii)

Comparing coefficients of , –A + B = 1 …….(iii)

Comparing constant terms, –B + C = 0 …….(iv)

Solving eq. (ii), (iii) and (iv), we get A =  B =  and C = 

Putting the values of A, B and C in eq. (i), 

=