# How to program quadratic formula in ti 83

Heron's Formula Program for the TI-83 and 84

Quadratic Formula for the TI and Have you ever wondered if there is a way to make your calculator solve quadratic equations for you? Well, there is a fairly easy way to make your calculator do all the work for you. Another program that I have put on Instructable Estimated Reading Time: 2 mins. ?·?Quadratic Formula Program for TI, 84 Calculators: Make math class a bit easier for you! Quadratics are useful in the real world and help solve many problems, but why should they make problems for you when you want to solve them? Well here my friends is an answer: The QuadForm Program! What you wil Estimated Reading Time: 1 min.

Unfortunately, not much documentation exists online on how to create programs using this feature. This tutorial provides an introduction on how to create a simple program to solve one of the most ubiquitous problems in elementary mathematics, finding the zeros of a quadratic equation. If you choose the name of an existing program, it will just open that program, so choose a unique name.

Names also cannot begin with a number. You can press 2nd and then ALPHA to enter alpha lock, which lets you type using only the green letters until disabled, instead of having to press ALPHA every single time you input a letter. You will then be taken to the program editing screen. If you press PRGM from this menu you are taken to the programming menu, which lists commands you can enter in. Under CTL are standard programming functions such as loops and conditional statements.

In order to create a program we need to prompt for user input, perform a calculation, and then display the result to the user. The quote tells the proggram that everything after it is to be displayed how to make fringe tassels text instead of evaluated as a calculation.

The prompt function asks the user to what are the badlands of south dakota values for A, B, and Pdogram, which are variables on the calculator.

Each letter, from A to Z, as well as theta, can be used to store a single number, and prompt does this for you for whichever letters you tell it to. Now that we have the values of A, B, and C in our equation, we need to do something with them.

You may recall that the quadratic formula is:. Now exit the program editor by pressing 2nd MODE. Now you can experiment by adding more features to your program. You can get this command by pressing MODE and selecting it from the list. The extra text on the bottom two Disp lines adds tormula labels to the solution and separates them from their corresponding equation using a comma.

You can download this program here. You can keep enhancing your quadratic formula program to include many other features, such as displaying the discriminant of the equation or formatting more nicely. Happy coding! How do you get the descriminant to display? I programmed this into my calculator exactly as written here. I even double checked with the screen shot that you have.

This previously happened before when someone else programmed it into my calculator. This might ;rogram strange, but could my calculator just be stupid? It might be one of your settings is wrong. Your email address will not be published. Notice: It seems you have Javascript disabled in your Browser.

Pin It. July 11, at pm. September 3, at pm. You can put the? Frac next to the variable on the Disp line to make it show as a faction. January 21, at pm. January 22, at pm. March 26, at am. Leave a Reply Cancel uqadratic Your email address will not be published. Search for:. TI Plus. Voyage HP 12c. Test Prep.

Running the Program

This tutorial, like our tutorial for the TI Plus and TI Plus , provides an introduction on how to create a simple program to solve the quadratic formula, which finds the zeros of a quadratic equation. On older calculators, this will be a drop-down menu reached by pressing the APPS button. You will be prompted to name your new program. If you choose the name of an existing program, your calculator will give you an error, so choose a unique name.

When typing in the name of the program, alpha lock is automatically entered, although you can also use numbers in your application name as long as they appear after the first character.

You will then be taken to the program editing screen. Pressing F1 enters the tools menu, which allows you to cut, copy, paste, and create copies of programs. Under Control, which is reached by pressing F2 , you can find standard programming functions such as loops and conditional statements.

F4 opens the Var menu, which contains functions for dealing with variables on the calculator, and also contains the Local function, which we will use later in this tutorial. F5 opens the Find… feature, which lets you search your program for a specific string. This feature is especially useful when you are dealing with long programs. The name of the program and the Prgm and EndPrgm commands will already be entered into the editor. The body of the calculator program goes between these tags.

This function clears the program output screen every time the program runs so that data and graphics from previously run programs will not clutter the screen. Next, set the mode for outputting results as complex numbers in case any quadratic equations you enter result in imaginary solutions. We now need to display some information about the program. It makes sense for this specific program to display the equation the program solves.

Feel free to enter more detailed instructions in this step. Note that we entered the quadratic equation between quotes. This tells the calculator that we want to output the information as a string of text on the screen, as opposed to a calculation.

Otherwise, after running the program, using the letter variables on the home screen might end up giving unusual results. For more info on what can go wrong if your variables are not correctly defined and how to fix it, check out this quick fix.

We will be using the variables a, b, c, and d for this program, so enter Local a,b,c,d into the program. Remember that the Local function is on the Var menu, which can be reached by pressing F4. Next we need to collect user input. One easy way to do this is by using the Prompt function, which allows the user to input data into variables. Enter Prompt a,b,c to prompt the user for values to the a, b, and c in the quadratic equation. Now that we have the values of A, B, and C in our equation, we need to do something with them.

You may recall that the quadratic formula is:. Now we can use the variable d in our equations. Finally, we need to output the solutions to our equation, which can easily be combined with the remainder of the algebra into one step using the Disp function. Recall that expressions not in quotes will be evaluated, so we can enter this all in one line as below. Now exit the program editor by pressing 2nd ESC. Return to the home screen and test your program by entering its name followed by an opening and closing parenthesis and pressing ENTER.

For example, if you named your program quad , you would enter quad. You can keep enhancing your quadratic formula program to include many other features, such as displaying the discriminant of the equation, factoring the expression if possible, or even taking input through the program line entering quad a,b,c and getting an answer as opposed to being prompted in-program.

The possibilities are endless. You can download the source for this program here. Thanks for the input! Both programs look fine, maybe you have a different OS version? What error did you get? That was amazing! I have created my first ti89 program. Thank you so much. I have made the program several different ways, and none of them work.

Inside parenthesis what do I write? None of these have worked. This was a very helpful step-by-step instruction for those who are writing their first few TI programs.

Thank you very much for the clarity of the instructions. Thanks, I think I may teach the quadratic formula both ways. First is the traditional way. Thanks, this was very helpful. The instructions were very clear. I tested it out and it turned out just fine. Would you have a line of code that would always show the whole answer, or be able to scroll? I wrote this program for a ti 89 while at college.

Missed a couple words here and there, no edit function so reposting. Good tutorial for the most part. One suggestion though? Any suggestions? Great job on instructing me through my first program on the TI Very clear and easy to follow 2. How may I display my answers in a decimal form? How would you be able to pick up the solutions after calculated? Your email address will not be published.

Notice: It seems you have Javascript disabled in your Browser. Pin It. April 28, at am. May 3, at pm. November 3, at pm. March 20, at pm. March 28, at pm. March 31, at pm. August 28, at pm. Thank you thank you thank you!! November 6, at pm. March 7, at pm. July 25, at am. September 10, at am. November 1, at pm.

February 15, at am. Thank you so much! March 5, at pm. October 7, at pm. October 8, at am. You could also add the line Local a,b,c,d,e,f,g,l,m,r just after the first ClrIO to make the variables local not accessible outside the program.

Muff Potter. February 10, at pm. October 10, at am. Dez holden. October 11, at am. Two things: 1. Louis Clements. November 16, at pm. My question is when you write a program on the ti89, how do you space between words when needed? September 12, at pm. October 28, at pm.