why does negative*negative=positive?

Basically if you rotate one of the minus' by 90 degrees and add it on top of another minus it equals a plus

- - = +

Posted from TSR Mobile

ok

The 90 comes from space.

This thread is painful to read.

Any complex number can be written in the form re^i(theta), for negative numbers theta = (2n+1)pi (r is the (positive) magnitude of the negative number)
When you multiply two numbers:
re^i(2n+1)pi*se^i(2m+1)pi = rse^i(2n+2m +2)pi = rse^i(2k)pi
e^ik(2pi) = 1
therefore = rs*1 = rs
no negative sign any more

Thanks for clearing that up... lol jk thanks for taking time to explain just a little lost hehe

yh

Because God demands it to be so. Don't question it.

What are your starting axioms?

Ask the insanely brainy person who came up with this rule because I sure as hell don't understand it.

y

http://www.confused.com

How dare you question God! You and the non-believers will burn eternally in the sulphurous pit with Satan the AntiChrist and the False Prophet!
Unless you pray to this arab dude with white skin and blue eyes - then you'll instead go to utopia.

Do you genuinely not understand why that is?

yh