We know that:
So multiplying surds that have the same number inside the square root gives a whole, rational number.
Simplify the following surds:
First, simplify the numbers inside the square roots if possible, then multiply them.
First multiply the whole numbers:
Then multiply the surds:
Just like the method used to multiply, the quicker way of dividing is by dividing the component parts:
Divide the whole numbers:
Divide the square roots:
So the answer is: