Why Is a Negative Times a Negative Positive? 99.9% of People Can't Explain It!

By TabletClass Math

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Why does a negative times a negative equal a positive? Most students learn the rule that multiplying two negative numbers gives you a positive number, but have you ever wondered why this actually has to be true? Improve your math skills with TabletClass Math Academy: https://tcmathacademy.com/ In this video, I'll show you a mathematical proof explaining why a negative multiplied by a negative must be positive. Before getting into the proof, we'll quickly review several important ideas that make the proof possible, including positive and negative numbers as additive inverses, the distributive property, and the basic properties of equations. Then we'll use these fundamental properties of mathematics to show that the familiar rule negative × negative = positive isn't simply an arbitrary rule that students are expected to memorize. Once these basic properties of arithmetic are established, the result is forced. This is a great lesson for anyone studying basic math, pre-algebra, algebra,

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