Question about Texas Instruments TI-89 Calculator

TI-89 Factoring Not Working

I am trying to use the Factor function and it is not working. When entering f2, 2 for factor(, (x-5)^2,x) I should get x^2-10x+25, instead I get the result (5,)^2.... Why? There must be something in the mode that is set wrong, but I am not sure what..Your thoughts...

mathwizard69 Nov 15, 2007

When i use the factor function on my calculator under F2 it tells me i have a dimension error, what does that mean and how can I get my calculator to factor

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5 Answers

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

Posted on Oct 07, 2007

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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?

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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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TI-89 Factoring Not Working

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Anonymous

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Factoring by grouping

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