Question about Texas Instruments TI-89 Calculator

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Ti89 titanium my TI-89, whenever i try to factor something like x2+2x+1, the calculator will not factor, but it just gives me a number.

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  • sweetkuki Apr 18, 2008

    Mine does exactly the same thing. When I factor using the example in the user's guide, I just get a number. Same thing with square root, following the example in the book. Very frustrating!!!



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Posted on Apr 29, 2008

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You probably have a value stored in the X variable. Clear it out by going to "Clean Up" ([F6]: achieved by pressing [2nd] then [F1]) and then "Clear a-z..." (Press [1]). Hit Enter to clear the values. 
Basically: Press [2nd], [F1], [1], [ENTER].
Then try.
Hope this helps. :)

Posted on Feb 11, 2009


If log of some number equals 1.4 then the inverse log of 1.4 is 10^(1.4) basically 10 to the x power.

Posted on May 27, 2008

I am assuming you mean x squared. You need to put brackets at the start and the end of the problem. The answer will be
(x+1)2 (meaning squared)

Posted on Apr 06, 2008

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Just use NewProb command. Its quick and clears screen too. Solution #4 is correct. Not everything factors and many different ways to do it. b/c x^2+2x+1 factors to (x+1)^2 not x2+2x+1. (X+1)^2 we can factor to complex partial fractions.

Posted on Sep 19, 2009

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1 Answer

My ti 89 won't factor

The polynomial cannot be factored in the set of Real numbers: The roots of the polynomial equation are complex.
You should use the command cFactor( found under F2:Algebra> A:Complex>2:cFactor(
However, you should set the Mode Complex>Rectangular, and the EXACT/APPROXIMATE mode to Exact, otherwise your roots will be in decimal representation.

Jan 01, 2014 | Texas Instruments TI-89 Calculator

1 Answer

When I try to factor a problem it gives me an answer with periods. example: I enter FACTOR(x^3-5xx) and the answer comes up as (2.)^2(3.)

You apparently have a numerical value stored in the variable "x" and the calculator is using that value. To get rid of it, press 2ND [VAR-LINK], scroll down to the line containing the variable x, press F1 1.

Jun 30, 2010 | Texas Instruments TI-89 Calculator

1 Answer

Does a TI 89 have an advantage over a TI 84 in a 10th grade algebra class? My sons teacher won't let him use an 89. He says it does too much of the work for him. Is this right?

the 89 is in my opinion not need/ approriate for a 10th grade algebra class, or worth the extra money.

for example the 84 wont output variables it must output a number

so your son may be doing factoring, if he inserts (x^2+2x+1) the 89 will allow him to enter it and factor it as (x+1)(x+1) or (x+1)^2 the 84 will not.

the 84 will do pleanty as far as graphing, finding zeros,plotting, calculations, and should get him any answer that he seeks so long that he knows how to use the 84. It just wont give him the intermediate steps the the 89 is able to give.

hope this helps

Apr 05, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Can you Factor on a TI-84? IF not, does the TI-89?

Well, to answer part of your question, yes... the TI-89 does factor like this. it is inputted like this:


Check the catalog in the TI-84 (which is 2nd-zero) and look under F for factor()

Jan 12, 2009 | Texas Instruments TI-89 Calculator

1 Answer


you are an idiot you are entering in the equation which you wish to be factored in the wrong order quit taking stupid pills and look it up in the manual do not annoy people with such an ignorant problem ask a friend. And if you don't have one then throw your calculator against the wall as hard as you can and learn to factor the old fashion way you ******

Jan 07, 2009 | Texas Instruments TI-89 Calculator

5 Answers


x^2+5x+7 won't factor any more.. if you're trying to solve it, do:


May 15, 2008 | Texas Instruments TI-89 Calculator

1 Answer

When factoring or finding deriv. it gives me number?

oh yeah, you must've archived x, that is, you put a number onto the x variable so that the calculator calculates the answer for you, and THEN AUTOMATICALLY calculates the answer when x is in terms of that number. I am guessing you accidentally did 10[sto] x at one point. You can simply unarchived the x number and everything will be dandy!

Dec 08, 2007 | Texas Instruments TI-89 Calculator

2 Answers

TI-89 problems

what i would do is go to the home screen and hit f6 and hit 'clear a-z' then you're good.

Oct 04, 2007 | Texas Instruments TI-89 Calculator

1 Answer

TI-89 Factoring Not Working

I think what you want to do is not to factor but to expand, which is the option right under factor [F2, 3]. expand((x-5)^2) = x^2-10x+25

Jul 13, 2007 | Texas Instruments TI-89 Calculator

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