Re: Need to factor trinomial equations...

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: Need to factor trinomial equations...
From: "P. Kolbus" <ae607@DETROIT.FREENET.ORG>
Date: Thu, 5 Dec 1996 05:06:11 -0500
Reply-To: "P. Kolbus" <ae607@DETROIT.FREENET.ORG>

Yep, I spent about 2 hours tracking down and fixing all bugs... That
program was written about 3 months ago and TI-basic has no commenting or
code management system.  Oh well...  (Tried several test cases including
all those that reported errors before, let me know if you find any others.)

The YAQFP routine will soon be implemented in a full-fledged quadratics
program. (vertex, focus/directrix, graphing, tables, more)

You can find YAQFP.85P attached in UUEncode format.

Thanks to all who reported bugs.  You help make YAQFP a better program.

At 20:41 12/4/96 -0500, Alynn Rifkin wrote:
>P. Kolbus wrote:
>>Which calculator?  If the TI-85, try YAQFP, a proggie I made.  Factors and
>>pretty-prints the results.  Enter A, B, C, and watch.
>
>
>I am having a problem with your program that I picked up on:
>               Sender: Discussion of TI Graphing Calculators in Education
>              <GRAPH-TI@LISTS.PPP.TI.COM>
>
>I wanted to test it out before giving it to my students.  The first few
>problems worked but I'm having errors on the following ones, so far:
>
>6x^2+19x-7 comes out (6x-2)(x+3)5
>       It appears to make the second factor (x+3.5) which works but is not
>correctly      factored.
>
>6x^2+11x-7 comes out (6x-3)(x+2)33333333333333 (I didn't count the 3's on
>the calc!)
>       Similarly, the second factor as x+7/3 or 2.33333333 works but is not
correct.
>
>6x^2+7x-5 comes out (6x-3)(x+1)666666666666666666
>15x^2+32x-7 is (15x-3)(x+2)33333333333333333  just to show it's not just 6x^2
>
>Can you help?
>
>Alynn
>______________________________________
>
>Alynn Rifkin  (arifkin@cybercomm.net)
>______________________________________
>
>
>

YAQFP.85P


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