How to multiply square roots
To multiply two square roots, multiply first the number outside the radicals, then the numbers on the inside and simplify the results. Let's break this down into easier steps
Basic:
Step 1: Simplify the numbers inside the radical.
can be simplified to 
and again to 
Step 2: Multiply the numbers
Becomes 
and that is your answer!
Advanced:
Step 1: simplify either of the square roots
can be broken down : 
= 
= 
Step 2: multiply the numbers outside of the radical and then the numbers inside the radical
-12 times 6 will be 72
-2 times 3 comes out to 6
-The result will be 
Step 3: Simplify the answer
Keep simplifying the numbers in and out of the readical until they are prime factors.
Multiplying square roots is just like multiplying normal numbers. What do you think?