Question about Texas Instruments TI-89 Calculator

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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

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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Posted on Jan 02, 2017

See image below

Oct 04, 2016 | Casio FX-9750GII Graphing Calculator

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

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

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.

You should use the command

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

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.

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

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

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()

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

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

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

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

May 21, 2014 | Texas Instruments TI-89 Calculator

Feb 17, 2014 | Texas Instruments TI-89 Calculator

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