Question about Texas Instruments TI-89 Calculator

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My ti 89 won't factor

When I try to factor a polynomial on my calculator it gives the answer as the same problem I put in. For example, if I say factor(3x^2+6x+9) it says the answer is 3x^2+6x+9. When I first got the calculator a few months ago it worked fine, but now it does this for almost any application I try to use.

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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.
my ti 89 won't factor - 4687f911-03ab-4d90-a897-eb823579f5c3.png

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Posted on Jan 02, 2014

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SOURCE: Ti89 titanium

WHAT IS THE KEY OR KEYS TO GET THE INVERSE LOG FUNCTION?

Posted on Apr 29, 2008

Flortzweich
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SOURCE: 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:

factor(6*x^2+11*x+4,x)

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

Posted on Jan 19, 2009

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SOURCE: What is wrong with my TI-89 calculator?

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Posted on Jun 06, 2009

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I am having trouble figuring out why my ti 89 has trouble figuring out integrals. for example i know that the integral of x^2 is x^3/3+c but my ti 89 gives me the answer in a decimal of fraction form. i do...


The calculator does not give a result of an integration with a constant. The form of the result will depend ob the EXACT/APPROXIMATE mode you have selected.
In the following screen capture, your integral has been evaluated with mode set to EXACT,AUTO, and APPROXIMATE. Pay attention to the syntax.

60131ab.jpg

To set the computational mode to EXACT, press the MODE button use the Function keys F1,F2 or F3 to move from page to page, point to EXACT/APPROX and use the right arrow key to unfold the submenu, then the Up or Down arrow to select AUTO, EXACT or APPROXIMATE and press ENTER to SAVE Configuration.
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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.

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

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When factoring or finding deriv. it gives me number?


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