God dang it keyonn, why do you have to delete the good questions that are funny?

4+2=

Bring the fraction a/a-4 to a denominator of 16-a^2

Question 4 of 10 2 points what is the second part of the process of investigating a question using data? a. rephrasing the question o b. describing the data c. collecting the data o d. making an inference submit

How do i simply this radical expression?