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

That's alright. The first Round Robin was finished, so I hope you can contribute to the second one.

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?

Very cool. :hurray:
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.

I had really good, motivational teachers most of the time, that makes all the difference.:)

: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 non-right 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."