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Author Topic: Quadratic Formula  (Read 10342 times)

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Offline Munchor

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Quadratic Formula
« on: October 31, 2010, 04:16:08 pm »
Ok, I was programming a few little things in BASIC to learn I got this problem:

Code: [Select]
:ClrHome
:Prompt A,B,C
:(BB-(4AC))->X
:If X<0
:Then
:Disp "NO REAL ANSWER"
:Else
:(-B+sqrt(X))/(2A)->Y
:(-B-sqrt(X))/(2A)->X
:Output(6,2,"RESULTS:
:Output(7,2,X
:Output(8,2,Y
It gives me error in:

Code: [Select]
(BB-(4AC))->X
It's probably a stupid and easy mistake.

Any help?

Thanks :)
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Offline jnesselr

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Re: Quadratic Formula
« Reply #1 on: October 31, 2010, 04:17:53 pm »
BB?  Try B^2.  Also, what error? syntax? what does it highlight on the goto?
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Offline Munchor

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Re: Quadratic Formula
« Reply #2 on: October 31, 2010, 04:20:59 pm »
Tried B^2 and BB, none works.

Syntax Error, it highlights in B, of B^2-(4AC)->X.
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SirCmpwn

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Re: Quadratic Formula
« Reply #3 on: October 31, 2010, 04:21:51 pm »
Lowercase B will not work, although I doubt you are doing that.  Try 2.
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Offline nemo

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Re: Quadratic Formula
« Reply #4 on: October 31, 2010, 04:21:52 pm »
B2 should fix the problem... also, this could be optimized into Ti Basic Dev's quadratic formula. or if you like your way:

Code: [Select]
ClrHome
Prompt A,B,C
B^2-4AC->X
If Ans<0:Then
Disp "NO REAL ANSWER
Else
Output(6,2,"RESULTS:
Output(7,2,-B+sqrt(X)/(2A)
Output(8,2,-B-sqrt(X)/(2A)
End
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Offline Munchor

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Re: Quadratic Formula
« Reply #5 on: October 31, 2010, 04:23:30 pm »
I tried that, B2 (two as an exponent)...
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Offline nemo

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Re: Quadratic Formula
« Reply #6 on: October 31, 2010, 04:24:03 pm »
are you typing "->" or are you using the [STO] key in the lower lefthand corner?
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Offline thepenguin77

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Re: Quadratic Formula
« Reply #7 on: October 31, 2010, 04:24:10 pm »
Ok, sorry if this isn't the problem, but we can't over look this.

You are using the STO button to get the arrow right? Not minus greater than.

Edit:
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« Last Edit: October 31, 2010, 04:24:40 pm by thepenguin77 »
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Offline jnesselr

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Re: Quadratic Formula
« Reply #8 on: October 31, 2010, 04:25:05 pm »
Please post the program.
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Offline Munchor

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Re: Quadratic Formula
« Reply #9 on: October 31, 2010, 04:26:27 pm »
Quote from: thepenguin77 on October 31, 2010, 04:24:10 pm
Ok, sorry if this isn't the problem, but we can't over look this.

You are using the STO button to get the arrow right? Not minus greater than.

Edit:
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OF COURSE NOT...
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Offline nemo

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Re: Quadratic Formula
« Reply #10 on: October 31, 2010, 04:29:44 pm »
so... any other ideas?
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Offline Munchor

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Re: Quadratic Formula
« Reply #11 on: October 31, 2010, 04:31:50 pm »
Quote from: nemo on October 31, 2010, 04:29:44 pm
so... any other ideas?

Made it working:

Code: [Select]
:ClrHome
:Prompt A,B,C
:B^2-4AC→X
:If Ans<0:Then
:Disp "NO REAL ANSWER
:Else
:Output(6,2,"RESULTS:
:Output(7,2,-B+sqrt(X)/(2A)
:Output(8,2,{-}B-sqrt(X)/(2A)
:End
Thanks
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Offline Michael_Lee

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Re: Quadratic Formula
« Reply #12 on: October 31, 2010, 06:09:53 pm »
Or better yet...

Code: [Select]
:ClrHome
:a+bi                             (Found in the [MODE] menu, allows imaginary numbers)
:2->dim(L₁
:Disp "AX²+BX+C=0
:Prompt A,B,C
:(-B+√(B²-4AC))/(2A->L₁(1
:(-B-√(B²-4AC))/(2A->L₁(2
:Pause L₁

Allows imaginary numbers!  (Scroll for answer, don't keep anything important in L1)

Edited:  Thanks, Qwerty.55
« Last Edit: October 31, 2010, 06:31:23 pm by Michael_Lee »
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Offline AngelFish

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Re: Quadratic Formula
« Reply #13 on: October 31, 2010, 06:29:35 pm »
The Superscript and subscript tags don't work in a code block. Try alt codes:

Code: [Select]
:ClrHome
:a+bi                             (Found in the [MODE] menu, allows imaginary numbers)
:2->dim(L₁
:Disp "AX²+BX+C=0
:Prompt A,B,C
:(-B+√(B²-4AC))/(2A->L₁(1
:(-B-√(B²-4AC))/(2A->L₁(2
:Pause L₁
EDIT: Sorry if this shows up a few hours late. I think I'm using the bandwidth for the whole building right now.
« Last Edit: October 31, 2010, 06:31:17 pm by Qwerty.55 »
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∂²Ψ    -(2m(V(x)-E)Ψ
---  = -------------
∂x²        ℏ²Ψ

Offline Deep Toaster

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Re: Quadratic Formula
« Reply #14 on: October 31, 2010, 06:38:53 pm »
So what was the error?
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