Find the partial fraction decomposition/

Question

I can't 

Answer 1

(2)

Step 1:

The partial decomposition is

Equate the and constant coefficients.

Substitute  in remaining two equations.

Substitute in .

Substitute in

Substitute in

Solution:

Answer 2

(3)

Step 1:

The partial fraction is

Find the partial fraction decomposition is

Equate the coefficients.

Subtract and constant coefficients equations.

Substitute  in .

Substitute in .

Substitute in 

Substitute in

Solution:

The partial fraction decomposition is