Why Is Negative Times Negative Really Positive?, by Hemanth, Street Science

Negative times negative is positive. Every school-going child learns this in grade school. It is one of the most fundamental pillars of mathematics on top of which more advanced concepts are built…

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The Best Explanation of Why Negative Times Negative Is Positive

The Best Explanation of Why Negative Times Negative Is Positive

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Why is negative times negative positive? PART I (James Tanton