The integral is
.

Let
, then 
Substitute corresponding values in
.

Solve the above integral by using partial fractions.
\Partial fractions decomposition.
\

Equate coefficients of
terms.

Multiply equation (2) by 2 and then subtract them.
\
Substitute
in equation (2).

Substitute
and
in equation (1).


Apply formula : 

Substitute
and
in above equation.

.
.