Proving the Negative Times Negative Rule

This video tutorial explains why multiplying two negative numbers results in a positive number. It begins with a review of basic multiplication rules for negative numbers, then covers key mathematical properties such as the additive inverse, zero property, and distributive property. The tutorial uses these properties to prove that a negative times a negative equals a positive, ensuring the equation remains balanced throughout the process.

Why does a negative times a negative equal a positive?

Provide a step-by-step explanation of how to prove that -5 times -5 equals positive 25.