It gave you the input because it is telling you what x is
I have a good record of guessing the right one so I would say #1.
First one is 4^2 or just 16.
Second one is using√ So what you want to do is 2√16
Hope this helps
Hello!
We have the following expression:

Let's multiply and simplify it, look:

We multiply a*a*a, so we can rewrite it as a³. The same with b*b as b².
So, the answer in the simplified form is:
6a³ + 4b²