That is the correct answer
No, you cannot used that because you won't be able to solve that.
It should be all real numbers
Answer:
C is the answer
Step-by-step explanation:
<u>Answer:</u>

<u>Step-by-step explanation:</u>
We are given the following expression and we are to simplify it:

To make it easier to solve, we can also write this expression as:

Now we will cancel out the like terms to get:

Taking the square root of the terms to get:

