Let I = ……….(i)
Let ……….(ii)
Comparing coefficients of A + B = 0 ……….(iii)
Comparing coefficients of B + C = 5 ……….(iv)
Comparing constants 9A + C = 0 ……….(v)
On solving eq. (iii), (iv) and (v), we get A = B = C =
Putting these values of A, B and C in eq. (ii),
From eq. (i),
I =
=
=
=