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Q: Factoring Quadratics on the Texas Instruments TI-83 Plus ( Answered 3 out of 5 stars,   1 Comment )
Question  
Subject: Factoring Quadratics on the Texas Instruments TI-83 Plus
Category: Computers > Hardware
Asked by: craveonewave-ga
List Price: $10.00
Posted: 16 Oct 2003 10:34 PDT
Expires: 15 Nov 2003 09:34 PST
Question ID: 266946
How do you factor quadratic equations, such as x^2+7x+12, on the
TI-83?  I am not trying to solve, I just want to factor it.

When answering could you please list the steps taken to accomplish
this on the TI-83.

Thanks!

Request for Question Clarification by answerguru-ga on 16 Oct 2003 12:36 PDT
By solving you actually do solve these types of equation implicitly -
I can describe this more thoroughly in an official answer if you like.
Please let me know :)

answetguru-ga

Clarification of Question by craveonewave-ga on 16 Oct 2003 13:08 PDT
Yes, please describe the process used to solve this problem on the TI-83.

Thanks!
Answer  
Subject: Re: Factoring Quadratics on the Texas Instruments TI-83 Plus
Answered By: ufphoenix-ga on 16 Oct 2003 15:32 PDT
Rated:3 out of 5 stars
 
There is no POLY function on the TI-83 that I am aware of.  The TI-85
has one.  However, you can easily write a simple program for the
quadratic equation.  There are also polynomial root finding programs
available on the web free for download: 
http://education.ti.com/us/product/apps/83p/polysimult.html

Alternatively, you can enter the equation in the Graphing utility,
graph it, and use the "ROOT" function in the graph menu;  you trace
the graph to the closest point on the graph to the root you want to
find and then execute the ROOT function.  It will then give you the X
value.  Call that X1.  Do the same thing with the other root and get
that X value.  Call that X2.  The factorization of the quadratic is
(x-x1)(x-x2)=0.
craveonewave-ga rated this answer:3 out of 5 stars
A little brief for the amount of money given for a response to this
question, but thanks for the link to the TI website and telling me
that I can download a polynomial root finding programs.  I wasn't
aware of that, and that takes care of my problem.

So thank you for your reply.

Comments  
Subject: Re: Factoring Quadratics on the Texas Instruments TI-83 Plus
From: sebb-ga on 19 Oct 2004 12:04 PDT
 
Another polynomial divisions solver: 
http://www.ticalc.org/archives/files/fileinfo/354/35487.html

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