The long way to apply the product rule to simplify an expression of exponents

The video tutorial covers the rules of exponents, focusing on the product rule. The teacher explains how to multiply exponents with the same base by adding their powers. Examples are provided to demonstrate the application of the product rule, including handling negative and zero exponents. The session concludes with simplifying expressions using these rules.

Can you explain how to combine exponents with the same base?

What happens to a variable raised to the zero power?