Answer:
⇒

⇒

⇒

⇒

Explanation:
Let's go in order and find the matching component:
1.

All the resulting bottom values have no coefficients in the outside of the root. So we can start by putting the coefficient inside.
, and one of the answers has 12 in them but the x on the outside which we can just get by sqaure rooting the
. So, it will be

2.

Same thing, let's put the coefficient and variable inside.
. Now we can just square root the y and bring it outside the radical :

3.

Let's do the same as the other two.
. Now square root the
which is just
and bring it outside the radical -->

4.

Lastly, same thing again.
. They didn't completely simplify, however,
is equivalent.
That's it!