Why do two negatives equal a positive when multiplying?

They cancel out each other

Imagine if you were multiplying
-2 * -3
you would get 6

if you did
-2 * 3
you would get -6 because there isn't another - to cancel it out

I learned it that when you have a negative before a negative, put parenthesis around the second number with the negative, so it looks like this
-(-2)
if you look at the -(- it looks like a plus sign

that probably doesn't make much sense but we cancelling it out is just a rule, we don't really know why we do it

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