Answer:
a.)
Explanation:

Find the simplest radical form for
:
Find two numbers that multiply to 12, one of which is a perfect square:

Separate:

Simplify by finding the square root:

Insert the simplified version:

Find the simplest radical form of
:
Find two numbers that multiply to 8, one of which is a perfect square:

Separate:

Simplify by finding the square root:

Insert the simplified version:

Sorry this is taking forever to type, here