Simplifying a radical expression by using the product rule

The video tutorial explains the process of simplifying expressions using the product rule and square numbers. It begins with a discussion on the complexity of prime factorization of 16 and then introduces the product rule to simplify expressions. The instructor breaks down the expression 16 and X^8 into squares and demonstrates how to calculate their square roots to arrive at the final answer, X^4.

What is the result of taking the square root of 4 squared as described in the text?

Describe the final answer provided in the text regarding the square root of X squared.