Simplifying a radical expression by rationalizing the denominator

The video tutorial explains the concept of square roots, focusing on which numbers can be square numbers and how to handle operations involving radicals. It discusses the multiplication of numbers under radicals and the simplification of expressions to achieve a final simplified form. The tutorial aims to clarify these mathematical concepts through examples and logical reasoning.

What is the significance of square numbers in relation to square roots?

Why can't we multiply a number outside of a radical inside of a radical?