Answer:

Explanation:
A fraction has the following form:

Where "a" is the numerator and "b" is the denominator.
For this exercise it is important to remember that:

Then, in the exercise you have the following fraction:

Based on the explained before, you need to break the numerator into two parts (with the same denominator) in order to write the fraction as a sum or difference.
Then, written as a sum, this is:
