# How do you evaluate #(3a -9i +2ai +6)/(a^2+9) + (3-9i+3i+9)/(9+a^2)#?

##### 1 Answer

Aug 14, 2017

#### Explanation:

The first thing we notice with the two expression here is that the denominators are the same since

This means that we can "combine" the two fractions to add the numerators:

Now, we can combine like terms on the numerator. The like terms have been put in the same color, so you just add/subtract them:

Rearranging to bring like terms closer together and to make it easier to simplify: