Question about Casio FX-115ES Scientific Calculator

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Finding Rational Zeros of Polynomials on a Casio FX-115 Sci. Calc.

Is it at all possible to find the zeros of this equation on this calculator?

x4-5x3-5x2+23x+10

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I'm not sure how to do x4,
but from -5x3 and on yes. Mode-5-4, and insert coefficients.

Here the solution:
1. 1.927
2. -0.413
3. -2.514

Posted on Dec 02, 2008

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Is it possible to solve eqn in this 82ms calculator


Sorry, It is not possible to solve equations on the Casio FX-82 ms. Try the Casio FX-115 ES/ FX-115 ES Plus, FX-991ES/ FX-881 ES Plus C.

Oct 29, 2013 | Casio FX82MS Scientific Calculator

1 Answer

How can i write this in my calculator example. 2x=10 the answer is x=5 but how can i put x in the calculator


What you want to do is solve the linear equation 2x=10 to find the value of the unknown x that makes the equality true. Solving an equation usually involves rearranging therms, factors and so on. However your calculator was not designed to handle the solution of equations, no matter how simple they are.
Some Casio scientific calculators can solve some types of equations (polynomials of degree 2 or 3, simultaneous linear equations in up to 3 unknowns). These are the FX-115 ES (Plus) and FX-991 ES (Plus C). Other equivalent models are sold in the world under different names.

Oct 16, 2013 | Casio FX350MS Scientific Calculator

1 Answer

How do i calculate my rational equations using my casio fx-115es for example x/8=8/x


You do not need a calculator for this proportion.
For a proportion a/b=c/d, the product of the extrems (a*d) is equal to the product of the means (b*c).
In your case x*x=8*8 or x^2=64.
The two solutions are x=+square root (64) or x=-square root(64).

For a less trivial equation, you can use the solve feature of the FX-119ES. To do so, use the ALPHA keyboard to enter your equation; once the equation is typed in, do not press the main equal sign, but the Solve key (the key is located near the top left corner of the keyboard). You will be prompted to solve for X?.

Feb 24, 2012 | Casio FX-115ES Scientific Calculator

2 Answers

Can casio fx-991es factor?


No it cannot factor. It does not do symbolic manipulations.If you know a bit of theory of polynomials you can find the roots of the polynomial equation. The calculator has a Solve utility. Once you have the roots, you can use your knowledge about polynomials to carry out the factorization procedure.

Aug 31, 2011 | Casio fx-300ES Calculator

1 Answer

How to find roots of a polynomial using fx 115 ms


It depends on the degree of the polynomial.
If polynomial is od degree 2 or 3 you can use the EQN mode (the equation MODE) by pressing [MODE][5:EQN] to enter Equation mode then press [3] for quadratic polynomial or [4] for a cubic one.
You will then be prompted for the various coefficients. The canonical form of these polynomials is aX^2 plus bX plus c= 0, and aX^3 plus bX^2 plus cX plus d=0.

If polynomial is of degree higher than 3, or for a general non-linear equation you must use the Solve( feature. See example #017 on page 6 of the appendix to the manual.

Nov 28, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

How do I factor using the fx-115 ES calculator? would a problem like 9x^2+24x+16-Z^2 be solvable on this calculator? If not, does Casio sell any calculators that would help me factor this equation?


No, your calculator cannot factor polynomials. You need a calculator that has a CAS (computer Algebra System)
Yes Casio sells calculators with CAS: The FX-Algebra 2.0 and 1.0, the FX-9860GPLUS/GII SD, the GRAPH85 or 80 and the Graph 100+. You also have the CLASSPAD Series 300PLUS and 330.
TI and HP also have CAS calculators.

Texas Instruments
TI 89 /Titanium, Voyage 200PLT, TI92PLUS (discontinued), TI Inspire CAS.

Hewlet-Packard
HP 48G/G+/GX, HP40G, HP49G/G+ and the top of the line HP50G

Oct 28, 2010 | Casio FX-115ES Scientific Calculator

1 Answer

Can i solve an equation of second degree(like X^2+2X+1) with Casio FX-7400G Plus ? If so how?


Sorry but the calculator does not have a solving routine. You can however use the graphing capabilities of the Casio FX-7400GPLUS to solve an equation f(X)=0.
  1. Graph the function Y=f(X)
  2. Use the trace function to locate the point(s) where the function vanishes (has value Zero)
See the screen capture for an example.

If you were hoping that this calculator would be able to factorize polynomials for your, sorry my friend it cannot.

9c210b2.jpg
1594e5e.jpg

May 15, 2010 | Casio FX-7400G Plus Calculator

1 Answer

Can i solve an equation of second degree(like X^2+2X+1) with Casio FX-7400G Plus ? If so, how?


Sorry but the calculator does not have a solving routine. You can however use the graphing capabilities of the Casio FX-7400GPLUS to solve an equation f(X)=0.
  1. Graph the function Y=f(X)
  2. Use the trace function to locate the point(s) where the function vanishes (has value Zero)
See the screen capture for an example.

If you were hoping that this calculator would be able to factorize polynomials for your, sorry my friend it cannot.

9c210b2.jpg
1594e5e.jpg

Mar 27, 2010 | Casio FX-7400G Plus Calculator

1 Answer

How do you Factor a Polynomial on a Casio fx-300ES


Hello,
Sorry, but you cannot use this calculator to factorize a general polynomial.
1. It does not know symbolic algebra.
2. It can only manipulate numbers.

However if you have polynomials of degree 2 or 3, with numerical coefficients (no letters) you can set [MODE] to equation and use the equation solver to find the real roots of 2nd degree or 3rd degree polynomials. Assuming that your polynomials have real roots (X1, X2) for the polynomial of degree 2, or (X1, X2, X3) for the polynomial of degree 3, then it is possible to write
P2(X) =a*(X-X1)(X-X2)
P3(X)= a(X-X1)(X-X2)(X-X3)
This is an approximate factorization, except if your calculator configured in MathIO, has been able to find exact roots (fractions and radicals)
where a is the coefficient of the highest degree monomial aX^2 +...
or aX^3 +....

But I have a hunch that this is not what you wanted to hear.

Good luck.

Mar 08, 2009 | Casio fx-300ES Calculator

2 Answers

Factoring polynomials "Algebra"


Mode>choose "5"
choose equation format "4"
input the coefficient for a which is "1" and hit "="
input the coefficient for b which is "4" and hit "="
input the coefficient for c which is "3" and hit "="
input the coefficient for d which is "12" and hit "="
Hit "=" for X1
Hit "=" again for X2
Hit "=" again for X3

Nov 18, 2007 | Casio Office Equipment & Supplies

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