# “Negative Times Negative Is Positive”, But Why?

Published in

6 min readMar 20

--

A basic rule we all learn very early in our mathematical education is that

“a negative number times/multiplied by a negative number is a positive number”. We are instructed to repeat this so often it almost becomes a mantra for these early years of mathematical development. What we don’t learn, and what we are not taught until probably college level, is why.