How do you solve this and what is the answer?

We want to get rid of the square root sign somehow, so let's isolate that term.





Now, in order to 'undo' a root sign, we need to do the opposite to it, by squaring the term, but in order for it to remain the same, we need to square 4 as well.



Now, we can isolate the variable:

, and since we can't simplify this further, our final answer becomes:

or