Hello, I am an inexperienced TI-83 programmer who wants to write a
program to complete the square; that is, turn a quadratic expression
into a square +/- some number. The answer I want my program to
generate includes "x" as a variable. However, I can't figure out how
to incorporate x into my program itself. I have tried doing so
straightforwardly (that is, storing for display an expression
containing X. I used the button on the third row--X, T, theta, n-- to
get my X.) But when I do this, the result displayed when my program is
executed does not include any X's -- it is just a regular number. How
do I fix this? Many thanks.

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Request for Question Clarification by googleexpert-ga on 22 Sep 2004 18:13 PDT

Hi redmango,
Can you describe what the user is suppose to input for the Quadratic expression?


Thanks.

-googleexpert

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Request for Question Clarification by googleexpert-ga on 23 Sep 2004 21:14 PDT

For your program, what is the input?

Is it in the form of AX^2 + BX + C
where the user the value of A,B,C?

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Clarification of Question by redmango-ga on 24 Sep 2004 17:10 PDT

Googleexpert, 

Yes! That's correct. Ax^2 + Bx + c, for A, B and C. Thank you.

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Request for Question Clarification by googleexpert-ga on 25 Sep 2004 05:59 PDT

Can you post your program's source code?
Thanks.

-googleexpert

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Request for Question Clarification by googleexpert-ga on 26 Sep 2004 13:31 PDT

Forgot to ask...

Are parts of your program something like this?

display "AX^2+BX+C Solver"
Input "A: ",A
Input "B: ",B
Input "C: ",C
Y1 <- (B+\/(B^2-4*A*C))/2*A
Y2 <- (B-\/(B^2-4*A*C))/2*A

display "X = ",Y1
display "Also X = ",Y2

Please let me know what part of your program
you think is causing the "X error".

Thanks.

-googleexpert