Question about Texas Instruments TI-84 Plus Calculator

# How to program quadratic equation - Texas Instruments TI-84 Plus Calculator

Posted by on

• kakima May 11, 2010

What's wrong with the first activity in the Guidebook?

×

• Level 3:

An expert who has achieved level 3 by getting 1000 points

Superstar:

An expert that got 20 achievements.

All-Star:

An expert that got 10 achievements.

MVP:

An expert that got 5 achievements.

• Texas Instru... Master

I have no idea what you mean by program in this context. So I am going to assume you want to solve, because that is what one is supposed to do with an equation.

Suppose you have the quadratic equation a*X^2+b*X+c=0, where a, b, and c are constants. Specify your own constants if you want to use this calculator.

1. Define a function Y1= a*X^2+b*X+c
2. Graph it if you want.
3. Use the solve( command to find the roots of the equation (the zeros of the function)
To access the solve (
• Press [2nd][0] to open the (CATALOG) of commnands
• Press [LN] (S) to jump to the first command in the CATALOG that starts with S.
• From there, scroll down till you point to solve(
• Press [ENTER]
• Commnd echoes on main calculator screen as solve( with blinking cursor. You must enter the function Y1 you defined before.
• Press [VARS], and right arrow to highlight [Y-Vars]
• Select [1:Function] then [1:Y1]
• Y1 echoes on main screen, which displays solve (Y1
• Complete the command by entering a comma, X, a comma, initial guess and ) parentheses.
• The screen dispays solve ( Y1, X, value_of_initial_guess)
• Press [ENTER]
• If your guess is good, you will not wait long to have one solution.
• To obtain the second one, press [2nd][ENTRY] to recall the last command to the command line solve ( Y1, X, value_of_initial_guess).
• Use the arrow to modify the value of the initial guess, make sure the ) is still there and press [ENTER].
• If the guess is good you will get the second solution.
Here is an exemple. Y1 is just X^2+X-14. For the negative root I took the initial guess to be -3, and for the positive root the guess is 2.

How did I get such good guesses? Usually it is trial and error, but I cheated: I drew the function to have an idea about the values of X where the function vanishes.

Posted on Jan 31, 2010

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs \$6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
Goodluck!

Posted on Jan 02, 2017

×

my-video-file.mp4

×

## Related Questions:

The calculator cannot do symbolic algebra. If equation is aX^2+bX+c=0, write it in the form a(X^2+(b/a)X+(c/a))=0 and solve the quadratic equation X^2+(b/a)X+(c/a)=0. Get the approximate roots X1, and X2 (if they exist) and write your original equation in the for
a(X-X1)(X-X2)=0

May 28, 2014 | Casio Office Equipment & Supplies

### How to solve quadratic equations on fx82ms calculator

You can do it the same way people did it before calculators were invented. Just use the quadratic formula: http://en.wikipedia.org/wiki/Quadratic_formula. Some sophisticated calculators have generalized equation solvers that can handle equations much more complicated than the quadratic, but the fx-82 isn't one of them.

Nov 06, 2013 | Casio FX82MS Scientific Calculator

You can do it the same way people did it before calculators were invented. Just use the quadratic formula: http://en.wikipedia.org/wiki/Quadratic_formula, and let the calculator handle the arithmetic. Some sophisticated calculators have generalized equation solvers that can handle equations much more complicated than the quadratic, but the fx-82 isn't one of them.

Nov 06, 2013 | Casio FX82MS Scientific Calculator

### How can i solve quadratic equation (aX^2+bX+c=0) with my BA II plus texas instrument calculator?

The BAIIPlus doesn't have anything specifically for solving quadratic equations. You can simply plug the coefficients a, b, and c into the quadratic formula.

Oct 03, 2013 | Texas Instruments Office Equipment &...

### How to solve quadratic equation in fx-100ms

See if it has an equation mode, and select quadratic equations. If it has a SOLVE feature, enter equation, provide a guess and solve.

Feb 26, 2013 | Casio Office Equipment & Supplies

### I want to solve an complex equation on casio fx-570 ES Plus

Your scientific calculator is unable to solve complex equation with complex coefficients. You should try to solve by hand directly using the quadratic formula or by factoring the polynomial in z
failing that, another way would be to set z=x+iy, substitute this for z, carry out the algebra and try to separate real and imaginary parts. But your two equations will constitute a system of two quadratic equations. I am not aware of any general method to solve coupled nonlinear equations.
Good luck.

Dec 20, 2012 | Casio FX-115ES Scientific Calculator

### How can I compute quadratic equations using fx-300ES?

You cannot solve the quadratic equation with this calculator. It does not have a solve program.

However if you wnat to create a table of values for a function (any type of function that uses the basic scientific function keys ) you use the TABLE Computational Mode.

You press MODE
You select TABLE
You enter a mathematical expression 3X^2-.33X+ 15
You generate the table of values.

Aug 28, 2011 | Casio fx-300ES Calculator

### 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
http://support.casio.com/manualfile.php?rgn=1&cid=004001004

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

### How to solve a quadratic equation

The form of quadratic equation is

The roots of the above quadratic equation are

Nov 07, 2010 | Computers & Internet

### Want to solve quadratic equations on my casio 3650p super fx

Hello,
In your manual, Appendix Program Library, (Page A1) you have the listing of the problem to solve the quadratic equation. Type it in your calculator and execute it.

Hope it helps.

Aug 13, 2009 | Casio FX-9750GPlus Calculator

## Open Questions:

#### Related Topics:

159 people viewed this question

Level 3 Expert

Level 3 Expert