2006-09-11 10:20:36 · 10 answers · asked by SAMZ M 1 in Education & Reference ➔ Homework Help
Because a negative number is the "Opposite" of the value presented
-7 means opposite of 7
-7 * -7 = --49 (negative negative 49)
the opposite of -49 is +49
2006-09-11 10:26:07 · answer #1 · answered by Sean06 2 · 0⤊ 0⤋
It's a law, or convention, in mathematics. You can, however, verify that the product of two negative numbers is a positive number: You can only divide a positive number with a negative number to derive a negative number.
2006-09-11 17:30:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
You do not need to prove it, it is the way it is. Sorry that probably didn't help you much.
2006-09-11 17:22:20 · answer #3 · answered by Marie 3 · 0⤊ 0⤋
because they go further in the same direction,so that is a positive. so when you asked did you have more, you well answer positive.
2006-09-11 17:29:53 · answer #4 · answered by Nabil 5 · 0⤊ 0⤋
This is the best way to at least remember it:
If something good happens to a good guy, that's good.
If something bad happens to a good guy, that's bad.
If something good happens to a bad guy, that's bad.
If something bad happens to a bad guy, that's good.
2006-09-11 17:28:45 · answer #5 · answered by Nojunk N 2 · 0⤊ 0⤋
I'm not a mathematician, but here is a webpage that explains it in four analogies.
http://www.ncsu.edu/felder-public/kenny/papers/negative.html
2006-09-11 17:26:01 · answer #6 · answered by falkon81 2 · 1⤊ 0⤋
There is no proof, everybody just knows it as a rule
2006-09-11 17:27:03 · answer #7 · answered by Anonymous · 0⤊ 0⤋
I don't think you can prove it, it's just a rule.
2006-09-11 17:21:36 · answer #8 · answered by Heidi 7 · 1⤊ 0⤋
http://mathforum.org/dr.math/faq/faq.negxneg.html
2006-09-11 17:27:09 · answer #9 · answered by Shintz62 4 · 0⤊ 0⤋
you cant
2006-09-11 17:23:01 · answer #10 · answered by Red Sawx ® 6 · 0⤊ 0⤋