Question about Texas Instruments TI-89 Calculator

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Factoring when i try to factor something like x^2+5x+7 where the roots are not whole numbers, my ti 89 wont factor it. It just spits out the equation you just typed in. I know ive done it before and am wondering if i changed a setting or something

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

solve(x^2+5x+7=0,x)

Posted on May 21, 2008

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Type: cFactor(x^2+5x+7,x) and you obtain solution for this problem.
See captured image



factoring - 12_7_2011_6_18_12_pm.jpg

Posted on Dec 07, 2011

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(t+9/t^2+9t+8)= (2/t^2+2t-48)

Posted on Jul 14, 2011

X^+.4x-.32

Posted on Nov 01, 2008

It won't factor it in the regular program because it is a complex number.

press F2 , go to A:Complex, hit the right key and select cfactor.

Posted on Oct 21, 2008

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1 Answer

Is it possible to calculate factors using a TI-30x IIS


I believe factors can be calculated on any basic calculator.

Starting with 1, increasing by 1 until you get to square root (number) + 1

Let's do an example.

28
square root (28)+1 = 6
Factors
1, 28/1=28
2, 28/2=14 14*2 - 28 = 0 (when you divide, you get no decimal)
3, 28/3=9.33333 - not a factor - doesn't go in evenly
4, 28/4 =7
5, 28/5=5.6 - not a factor - doesn't go in evenly
6, 28/6=4.66666 - not a factor
So now we can list our factors - 1, 28, 2, 14, 4, 7
Putting them in order, we get 1, 2, 4, 7, 14 and 28.

Good luck,

Paul

Jul 13, 2016 | Texas Instruments TI-30 XIIS Calculator

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.
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Jan 01, 2014 | Texas Instruments TI-89 Calculator

2 Answers

How do i solve the equations (r-3)(r+6)=0 using my ti-30xa


If you expand that formula into r^2 +3r - 18 = 0, then you can use the quadratic formula.

The two solutions for r are:

r = (-3 + sqrt((-3)^2 -4(1)(-18))) / 2(1) = 3

and

r = (-3 - sqrt((-3)^2 -4(1)(-18))) / 2(1) = -6

Try typing those in using the calculator to get the same results.

May 25, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

When i try expand solve or factor i get a dimension error


Using solve and factor requires correct mode and proper equation set up. Ref to manual might help.

Jul 20, 2009 | Texas Instruments TI-89 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:

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()

Jan 12, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Factoring


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

1 Answer

Factoring and expanding


try going to var link and deleting any variables like x and whatever you're trying to factor as they may be stored as lists and thus come out factored like that

Apr 25, 2008 | 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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