Answer:D
Step-by-step explanation:1- The given expression is:
+
2- Factorize the denominator of the second term:
+
3- Get the common denominator for both terms. In this case, the common denominator would be (m+9)(m-9):
+
This will give:
+
4- Add the numerators normally since the two terms have common denominator:
=

Comparing the calculated result with the given options, we will find that the correct option is the last one
Hope this helps :)