Question about Casio FX-115ES Scientific Calculator

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Inputing factors on a casio fx-115es calculator

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How would I enter that into my Casio fx-115es calculator in order to factor it out?

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  • Anonymous Mar 12, 2014

    How do I find greatest common factor with the casio fx-9750G PLUS calculator?

  • Anonymous Mar 12, 2014

    how do i find greatest common factor using a casio fx-9750g Plus calculator



3 Answers

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Unless I am failing to understand your problem, just combine like terms to get:
9x^2+2x+4 and then enter those coefficients into the quadratic solver.
That will get you the two answers -- both of them will be complex.
If you wanted to turn those two answers into factors (complex) of the original equation simply
change the signs on each and put an x in front.
Of course, the quadratic formula would also work.

Posted on Apr 28, 2009

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.05 x .05=
I keep getting 2.5x10-3 yes this is the answer but how do I get the calculator to show .0025

Posted on Jul 14, 2009

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How do i enter x^1/3=-2 into casio fx 115 es

Posted on Mar 16, 2010

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1 Answer

I forgot how to do linear regression on casio fx-115ES. Example: (1,2), (3,Y), (5,6). How can i solve for Y in casio FX-115ES?

Press [MODE][3][2]. In first column enter known x-coordinates (1 and 5), in second known y-coordinates (2 and 6). The solution you are looking for is in form Y=A+B*X where X=3. Your calculator computes A and B after you enter data. To calculate Y (which is equal to A+B*3 press [SHIFT][1][7][1][+][SHIFT][1][7][2][*][3][=]. The result should be 4.

If I helped you, please rate my answer :)

Sep 07, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

Factor this using casio scientific calculator: 4x^2-100

Sorry the calculator is unable to perform symbolic algebra calculations. Fortunately for you there is no need for the calculator. Use the special product (idemtity) (a-b)(a+b)=a^2-b^2 with a=2X and b=10

Aug 07, 2011 | Casio FX-115ES Scientific Calculator

1 Answer


In algebra x represents something. It is a place holder for some value. Now let that value be the word orange or some other word you prefer.
Read out loud the mathematical phrase :3 oranges minus 2 oranges
Complete the sentence as you used to do in grade school: 3 oranges take away 2 ( minus) 2 oranges leaves 1 orange.
Translate that sentence into mathematics : 3 oranges - 2 oranges = 1 orange.
Since this operation is true for oranges, pears, pencils, what have you, use the symbol x as a place holder for oranges, pears, pencils, what have you and write the universal truth which is
Make it more sophisticated by remembering that if a factor before a variable has value 1, you can just drop it. That leaves 3x=2x=x.
By the way, your calculator is just a scientific calculator without a Computer Algebra System and cannot make sense of symbols that have no values. So it cannot do it.

Jul 30, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

Can you factor quadratic equations on the Casio fx-11ES? If yes how?

Press MODE 5 to bring up the equation types. Press 3 for the quadratic. Enter the three coefficients. Press = to see the first root. If the display shows x1 then press down to see the other other root. If the display only shows x then that's a double root. Given the two roots x1 and x2, the factors of the quadratic are (x-x1) and (x-x2).

Refer to "Equation Calculations" on page E-55 of the manual and examples #094 and #095 in the appendix for examples of solving quadratic equations. If the you need the manual and/or appendix, you can download them from

May 11, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

How to do modulo operation in casio fx991ms

The fx-115ES does not have a modulo operator. However, it is possible to compute the remainder using integer arithmetic. Press MODE 4 to shift into integer mode. Then calculate A modulo B as
A - B * (A / B). For example, to calculate 41 modulo 6, press
4 1 - 6 * ( 4 1 / 6 ) =
and get 5.

Press MODE 1 to return to real arithmetic.

Feb 07, 2011 | Casio FX-115ES Scientific Calculator

1 Answer

I need to know how to simplify and not factor on my calculator

The Casio FX-115ES does not have a Computer Algebra System (or CAS), so it is incapable of factoring polynomials.
As to simplifications, the only ones that you can get with the FX-115ES are the display of fractions in their irreducible forms.


Aug 16, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How do I factor on my casio Fx115es -
It is all explained in the above manual.

May 09, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

-2[3x-5 (2x-3)]=3x-8 how do I do the brackets and the equal sign in this equation? When I try to use the regular = sign in the bottom right I get a syntax error?

Use the other = sign obtained by pressing [ALPHA][CALC]. You also use the[ALPHA] key before entering X,Y,A,B,C.D variables.

The = sign at the bottom that gave you syntax errors is in fact an EXECUTE command. It used to be marked [EXE] on Casio calculators

Mar 04, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Does anyone know how to calculate derivatives using the casio fx-115es? For example: find the derivative of f(x)= 3x^3=3x. Thank you!

The calculator will calculate the derivative at a point. It will not give you the formula for the derivative, just the derivative at the point you choose.
Sorry, it can ONLY do NUMERICAL differentiations and integrations.

Oct 21, 2009 | Casio FX-115ES Scientific Calculator

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