[Unknown Target]

The quadratic forumla we learned was -b + The square root of B^2-4AC, all divided by 2.

[Stunaep]

that's the one.

Then there's the simplified one:

-p/2+-sqr.rt.of (p/2)Ž2-q

Which is used when the equation is in the form of

xŽ2+px+q=0

That can also be solved using the Viete theorem.

[TopAce]

Originally posted by Unknown Target
....

5x^2+2x-1=0


-c^2=3c-3

y=-14x^2-(5/9)x+2

These are the most basic things in the Hungarian Education System, we are learning all we have no use for in the life.

[Unknown Target]

Originally posted by TopAce


These are the most basic things in the Hungarian Education System, we are learning all we have no use for in the life.

That's why i'm proud to be an American

BTW, even tho I couldn't understand them Flaser + Stunaep get kudos. Thnx guys, enjoy your parts

[Levyathan]

Originally posted by Unknown Target
The quadratic forumla we learned was -b + The square root of B^2-4AC, all divided by 2.

Wrong. All divided by 2a.

[an0n]

Don't make me start calculating the volume of revolution for an exponential curve containing complex polynomials between a and b!

[Flaser]

It's really hard to write down anything mathematical in vbulletin that's visally easy to understand as well.

I'll try to make a rtf file for you.

[Flaser]

I made it:
http://users.freestart.hu/szandtner/equation.rtf

[Unknown Target]

Originally posted by Levyathan

Wrong. All divided by 2a.

Oops, you're right, I thought I put that A in the post. Oh well

My brain hurts.

[CP5670]

have any of you seen the analogous formulas for cubic and quartic equations? Those are some of the messiest things I have ever seen, even edging out the euler-maclaurin formula.

I have also been stuck on a math problem for most of today actually; anyone here good with limits?

lim_s®n BinC(s+k-1,s-1) [ z[/size]'(s+k) + ( y(s+k) - y(s) ) z(s+k) ]

(n is a negative integer, k is an integer between 0 and s and BinC is the binomial coef)

[an0n]

Y'know, it's times like these that I feel better about the fact that I chose alcohol over study.

Also, on an unrelated note: Muwhaha. I'm gonna be relatively rich for doing sweet ****-all. Mwuahaha. All thanks to the Cyprian mafia and the dodgyness of my uncle.

[Nico]

To me, Hell is a big hairy math school.

[kasperl]

one more thing a bout all the quadratic formulas, pretty basic, but it might be of some help.

if you can write the thing as (x+-number)(x+-number) like you can write x^2+x-12 as (x+4)(+-3), you can solve it without any formula, in this case, x is either -4 or +3.

[Flaser]

Originally posted by kasperl
one more thing a bout all the quadratic formulas, pretty basic, but it might be of some help.

if you can write the thing as (x+-number)(x+-number) like you can write x^2+x-12 as (x+4)(+-3), you can solve it without any formula, in this case, x is either -4 or +3.

kasperl, those are the thanks to the Viet formula:

a*x^2+b*x+c=a*(x-x1)*(x-x2)=0

Beside the original are:
x1+x2=-b/a
x1*x2=c/a

You can get both by simply doing the procedures with the quadratic equation solution formula.

[Kamikaze]

Originally posted by CP5670

lim_s®n BinC(s+k-1,s-1) [ z[/size]'(s+k) + ( y(s+k) - y(s) ) z(s+k) ]

(n is a negative integer, k is an integer between 0 and s and BinC is the binomial coef)

Ahh, limits scare me.. I've been trying to learn infinitesimal calculus for the past bit and I can understand them enough to find derivatives, but my mind still doesn't want to accept their existence....

and the only formula related to cubic equations I could find in my math encyclopedia was Cardano's Formula... hmmm.

[Rampage]

Originally posted by CP5670

I have also been stuck on a math problem for most of today actually; anyone here good with limits?

lim_s®n BinC(s+k-1,s-1) [ z[/size]'(s+k) + ( y(s+k) - y(s) ) z(s+k) ]

(n is a negative integer, k is an integer between 0 and s and BinC is the binomial coef)

Hmm... [Deciphering]  I need a better picture of this... thing.  See if you can get a graphic out of MathType or Equation editor for this equation.  Say, is that zeta-prime (deriv. of zeta)?

By the way, I'll give you the link to one of the greatest mathematics references around: Click Here  Put it in your "Favorites" menu.

To answer Kamikaze, my son will be a senior taking AP Calculus BC at his high school.  He initiated a taste for mathematics back in eighth grade, similar to your case.  When he entered 9th grade, he asked the math department head for a calculus textbook.  He basically mastered calculus (with my help) in several months.  Say, does your high school offer AP Physics C?

[JR2000Z]

Originally posted by Kamikaze
As I'm going into High School soon I was interested in what kind of math you all took in your HS years,

How good are you in math?


i'm not real good with it so i took the IAG series  ( intergrated algebra/geometry). This was a three year/credit course and they teach you what you learn in Algebra and Geometry. The difference is it's three years instead the usual two. I took the first cource in summer school, the second course in my sophmore year, and a full geometry course in the following summer school also in replacement of the third IAG course.

i'll be a senior this year and i'm already finished with math so....

[Thorn]

the only math I remember from High School (get it? High? heh... hehehe... *cough*) was trig... mainly because it was simple.... the rest I forgot 10 minutes after writing the exam.. I'll probably never use any of it again, so why bother? trig I actually use when working with lightwave, I can actually do some of it in my head no problem (which is amazing for me, I'm terrible at doing math in my head), the rest of it went up in a cloud of smoke....

[TopAce]

Yeah, that is a true problem that we had been suffering with a part of science for years, and we forget everything a few month after we made the exam. These are the things you don't find interesting, and you won't use it in your own life. I absolutely hate maths, simply has no use.

[Kamikaze]

I love math, so I think I'll be taking some advanced route in high school... I'm one of those people who don't particularly care about the practical application of math. I just enjoy the profound elegance of the system.

The thing is, obviously the math they teach in school sucks... it's basically like those use-and-throw-away-cameras, you learn it, you use it (exams), you throw it in your mental trash can. Horribly wasteful... (both the cameras and school math)