calc question

[Simpson17]

how would i program my ti calculator to do the quadratic formula for me?

[Simpson17]

heres the formula i want it to do for me -
x = (-b+√b²-4ac)/2a
x = (-b-√b²-4ac)/2a

and √ is the square root symbol

it would also be cool if it could do -
y=ax²+bx+c

because thats what i need to know for some packet hes giving us... and its on my homework which i have to turn in soon, and i havent done any of it for the past week and a half ><

[Teowulf]

Originally Posted by Simpson17

heres the formula i want it to do for me -
x = (-b+√b²-4ac)/2a
x = (-b-√b²-4ac)/2a

and √ is the square root symbol

it would also be cool if it could do -
y=ax²+bx+c

because thats what i need to know for some packet hes giving us... and its on my homework which i have to turn in soon, and i havent done any of it for the past week and a half ><

Just hit the program button, then hit new, then type it in.

First say
Prompt A
Prompt B
Prompt C

Then do the formula.

[FrozenIpaq]

Ah, Ti 83's are not that great for programming in basic.

In a TI 86 it would be:

Input "A value: ",A
Input "B value: ",B
Input "C value: ",C
Menu (1, "Add", Add, 2, "Subtract", Sub, 3, "Exit" Exit)
Lbl Add
B*B-->B2
4*A*C-->C2
B2-C2-->D
√D-->D2
D2+(-B)-->D3
D3/(2*A)-->D4
Disp D4
Menu (1, "Again" Add, 2, "Subtract" Sub, 3, "Exit" Exit)
Lbl Sub
B*B-->B2
4*A*C-->C2
B2-C2-->D
√D-->D2
D2-(-B)-->D3
D3/(2*A)-->D4
Disp D4
Menu (1, "Add", Add, 2, "Again", Sub, 3, "Exit" Exit)
Lbl Exit
End


Well, I can't remember the exact setup of the menu function, but that is all from my horrible memory

[Teowulf]

Originally Posted by FrozenIpaq

Ah, Ti 83's are not that great for programming in basic.

In a TI 86 it would be:

Input "A value: ",A
Input "B value: ",B
Input "C value: ",C
Menu (1, "Add", Add, 2, "Subtract", Sub, 3, "Exit" Exit)
Lbl Add
B*B-->B2
4*A*C-->C2
B2-C2-->D
√D-->D2
D2+(-B)-->D3
D3/(2*A)-->D4
Disp D4
Menu (1, "Again" Add, 2, "Subtract" Sub, 3, "Exit" Exit)
Lbl Sub
B*B-->B2
4*A*C-->C2
B2-C2-->D
√D-->D2
D2-(-B)-->D3
D3/(2*A)-->D4
Disp D4
Menu (1, "Add", Add, 2, "Again", Sub, 3, "Exit" Exit)
Lbl Exit
End


Well, I can't remember the exact setup of the menu function, but that is all from my horrible memory

Whoa. You don't ahve to do all of that for a Ti-86. It only takes 5 lines of program for it.

[foXtrot]

I remember coding so many things for my TI-83 and writing chemistry or physics notes and "using" my calculator... I coded practically every formula/theorem I ever did in math. My programs were a great success and I was also the main distributor of apps in my school. Why I never genenrated a profit from it? Maybe I should have...

[Simpson17]

Originally Posted by billythekilly

Just hit the program button, then hit new, then type it in.

First say
Prompt A
Prompt B
Prompt C

Then do the formula.

could u type the entire thing out for me with the progs i listed.. sry i dont know how to program at all with the calc and havent read the manual to it yet.. all i know how to do is the disp command.

[FrozenIpaq]

Originally Posted by billythekilly

Whoa. You don't ahve to do all of that for a Ti-86. It only takes 5 lines of program for it.

Well, if you want to get it right and look good and have accurate results, that's the best way to go

PS: Do not try to make an Age Calc for yourself..I made one that told you how old you are in days (exactly, but not counting the hours) and it took me forever to find a correct algorithm to be usable..but I lost all my code when the batteries died out

[Simpson17]

also would i like go Prompt A

and for a use the alpha key and use the letter.. or is there an actual way to do it (sort of like using l1) and when i do my formula, its the smae thing.. do i jus type in a b and c... because i dont see any simple way to do this, except for itd take some time to sort out a command just doing it with X.