Eli5 Why is a negative times a negative a positive?

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I’m thinking of it like money. If I owe 5.00 dollars and then a multiply my debt by 5 dollars, I should be in debt by 25 dollars right? But -5 time -5 is 25. Please help.

Edit: my example was wrong sorry.

Edit: I’m still so confused but I think I got it. If I owe someone a dollar (-1). But that person doesn’t exist (-1). Id have my dollar still. Is that right?

In: Mathematics

12 Answers

Anonymous 0 Comments

If you multiply your debt by 5, you’re getting a debt of 5 * -5, which is a positive times a negative. Multiplying a debt by *negative* would be starting from 0 and “removing” your debt five times over, so your balance would be -(-5) + -(-5) + -(-5) + -(-5) + -(-5) = 25.

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