How do I solve this?

 Find the domain of each of the rational expressions. (Identify which values of x will make the denominator zero and thus are not allowed in the domain.)

 Divide your first rational expression by the second one. Write the answer in lowest terms.

 Find and state the common denominator between the two expressions. Build up each expression so that it has the common denominator. (Remember not to do any canceling at this point since you need those extra factors for the common denominator.)

 Add the two rational expressions together. Factor again if possible, and present the answer in lowest terms.

Problem 1:

4w-3

9w^2-1

Problem2:

20w-15