[bstone]

Wondering if anyone knows the code for, or how I can, get my Ti-83 to solve quadratic equations.

Thanks.

[adamk]

try this...

http://www.acad.sunytccc.edu/instruc...83/quadrat.htm

or

http://math.arizona.edu/~krawczyk/Ca...or/TI83QF.html

found this by googling "quadratic formula ti-83"

[Sage]

There's probably an easier way to do this than what I'm about to explain, but it's easy enough (and finds the roots of any function, not just a quadratic):

- Go to Y= and input your function, press GRAPH
- Press 2ND + CALC (it's above the TRACE button), choose 2 (zero)
- It'll show you the graph, asking for the Left Bound. Use the cursor to go slightly left of the x-intersection, press ENTER; repeat for the Right Bound
- When it asks for Guess?, place the cursor as close to the root as possible; press ENTER, and voila!

Of course, you could just also input it in the quadratic formula, which any calculator can do.

[phantomdragonz]

Originally posted by adamk:
try this...

http://www.acad.sunytccc.edu/instruc...83/quadrat.htm

or

http://math.arizona.edu/~krawczyk/Ca...or/TI83QF.html

found this by googling "quadratic formula ti-83"

Thats what I use, works well for me...

There is no quadratic function on the calc, if you have multiple roots, the only way to find them is to do the problem..

synthetic division anyone???

Zach <--- actually learned something

[DeathToWindows]

Yeah... I had a lot of fun with this in HS... my answer was to get a TI89 for college.

The TI-83 plus does not have a nice way to handle quadratic equations... grrr

[G4ME]

get and 89 and use the solve function, take you 2 seconds, csolve will give you real and non real roots, **** that synthetic division.

89 got me through diffy Qs and Linear algebra

[bstone]

I figured it out. The 83 has the Solver which works wonderfully.

W))T

[SamuraiDL]

Thank god i never have to see one of those ****ing calculators ever again...

[misc]

Math->0(Solver)

Push the up key. Insert equation. Make sure the equation is equal to zero. Hit enter.
Put in any random number, then press alpha enter (solve).

[Daveecee]

Originally posted by misc:
Math->0(Solver)

Push the up key. Insert equation. Make sure the equation is equal to zero. Hit enter.
Put in any random number, then press alpha enter (solve).

If you know anything about making programs, you could do the following (name it QUAD or something):

: Input "A=",A
: Input "B=",B
: Input "C=",C
: (-b+√(B^2-4AC))/(2A)->X
: (-b-√(B^2-4AC))/(2A)->Y
: Disp "X=",X
: Disp "OR",Y
: Stop


I couldn't figure out how to use the solver, so I just made that program and it made everything a lot easier.

[Fyre4ce]

...brings back memories. My very first programming endeavor was writing a quadratic equation solver in middle school on my TI-82.

But back to the topic: if you are serious about pursuing a degree in math, science, or engineering, get a TI-89!!! It's well worth the money. The unit capability alone is enough to justify the price, not to mention all the calculus functions and symbolic manipulation. I got one my senior year of high school and it has saved me countless hours over the last four years of college (I'm a senior in mechanical and aerospace engineering). And no, I'm not paid by TI to say that either.

Get one!!

[misc]

Originally posted by Daveecee:
If you know anything about making programs, you could do the following (name it QUAD or something):

: Input "A=",A
: Input "B=",B
: Input "C=",C
: (-b+√(B^2-4AC))/(2A)->X
: (-b-√(B^2-4AC))/(2A)->Y
: Disp "X=",X
: Disp "OR",Y
: Stop


I couldn't figure out how to use the solver, so I just made that program and it made everything a lot easier.

(Sorry to dig up an old thread!!)

Daveecee, the benefit of using the solver is the ability to solve cubic equations (ax3+bx2+cx+d) and other equations(ax^b, etc) that aren't just quadratic (ax2+bx+c).

Contact me off board and I will go into further detail with the solver.

[goMac]

Originally posted by Fyre4ce:
But back to the topic: if you are serious about pursuing a degree in math, science, or engineering, get a TI-89!!! It's well worth the money. The unit capability alone is enough to justify the price, not to mention all the calculus functions and symbolic manipulation. I got one my senior year of high school and it has saved me countless hours over the last four years of college (I'm a senior in mechanical and aerospace engineering). And no, I'm not paid by TI to say that either.

Get one!!

I can't agree more.

[Ghoser777]

[G4ME]

out of all the students in my engineering classes, none of them have anything other then TI calculators with 90% of them having 89s.

the prof even goes over how to solve equations using the 98 and if asked how do do it on any other calc he doesn't care.

[Albert Pujols]

I bought a Ti-89 Titanium. That thing got me through so many classes. Calculus, AP Chemistry, Intro to Health, World Lit., Art...

The Titanium is great because you can fill twice as many games as you can with the 89. I recommend Bomber Dude, Tetris, and Excite Bike.

http://www.ticalc.org/pub/89/asm/games/

[mindwaves]

No games, all work.

[entrox]

Bah. High school kids use TI calculators. Real men use HP calculators with RPN. *hugs his HP49G*