Mathematics
Well we have threads for foreign languages, why can't we have one for mathematics? This is pretty much a thread about anything to do with maths.
Ready... Set... Go! By the way, sorry I've been offline for so long.:cry 
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As for mathematics, I can't really think of anything. The only smart mathematical theory I know is the Quatratic Formula: B +/ the square root of B(squared)  4AC divided by 2A. 
It doesn't have to be a "smart Mathematical theory, it's just a discussion about anything to do do with Mathematics.

cool I'm in. I'm rusty but I used to be quite good... back when I was trying to become an engineer ;)

Oh yeah, I'm part of this "Maths Challenge" thing in school. I might get put on the "Maths Team" and compete against other schools in Mathematics. Cool huh?

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I did a competition for my final assesment in math... well I only had to do the first round and after passing it and writing my paper about it, I quit the competition for time reasons. So I never found out how far I would have gotten. So what shall we talk about? How do people feel about the square root of 1 not being defined? 
When I took algebra, we always made the square root of 1 "i". In that situation, the square root of a number such as 16 would equal 4(i), or something to that effect. Since there's no way to solve for a negative square root, I'd say it would be pretty hard to define.
8o 
Sorry,
it's the oposite. i square is 1 but the square root of 1 will remain undefined. Which is a trap I stepped into with much gusto over the years, :) The things you can prove with that mistake, it's hillarious. 
Luckily, I never had to try and prove anything with that mistake, or else I would probably have learned that lesson like you did. :

I remember the rule of 1. I flunked math both in High School and College...along with half the class.

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:lol:lol:lol
That is hilarious. To be honest, I would have no idea how to solve that. Nice save; you did answer the question correctly. Was it that on a test? 
Actually, I saw the image on a website, remembered it, and posted the link here. I wish I had done that in my Math class, though, just to see what the reaction would be.

it's cool! *L*
and technically correct. 
How sad I know the answer.
x=5cm Formula is x(squared) = a(squared) + b(squared) x(squared) = (4x4) + (3x3) x(squared) = 16 + 9 x(squared) = 25 x = square root of 25 x= 5 
i may even remember the the formula for nonright angles if I concentrate, how sad is that? *L*
something like: c²= a²  2ab COS(α) + b² probably wrong though, so someone please correct me :) . In any case the Cos of 90 degrees is zero, that's why it simplifies to c² = a² + b² 
(Smiles and nods)

did I get it right?

I don't know. I'm smiling and and nodding because I don't know what your doing.

ah :lol Ok.
*smiles and nods too, pretending she knows what she's doing* 
I have this friend who is a Maths GENIUS. And I don't just mean she's really clever/ good at Maths, she's an actual genius (though of course nowhere near Sam's level :b).
http://imgs.xkcd.com/comics/purity.png 
That's excellent.

xkcd.com has loads of these.

Sadly, I don't even know what the subject of physics is...
But I must say, math must be more important than school children think when they moan "why do I have to take this? I'll never use algebra." 
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