How to Program the Quadratic Formula into a CASIO fx‐9750GII

Step-by-Step Guide

1. 1

   Step 1: Turn your calculator on and go to the "PRGM" on the menu screen.

   You can also push "9".
2. 2

   Step 2: Create a new program by pushing the "F3" button under "NEW".

   , A small arrow should pop up and you will be on a new line. , This will actually take you to "PRGM".
   
   Push "F4" under "?" to type a "?" To type an arrow, push the arrow button on your calculator.
   
   It is just above the "AC/ON" button.
   
   Push Enter. , "B"?→B "C"?→C ,, Push Enter , To get the statements, push "SHIFT"
   
   "VARS"
   
   then "F1" underneath "COM".
   
   If (D<0) Push Enter Then "D<0.
   
   No real roots.
   
   Imaginary roots:" Enter ,, Enter , Make sure to use the "Else" from the "COM" section mentioned earlier.
   
   Else Enter "Two roots are:" Enter (-B
   - √D)÷2A→X Enter (-B + √D)÷2A→Y Enter X◢ Enter Y◢ Enter , Enter IfEnd , No real roots.
   
   Imaginary roots:"↵ (-B
   - √D)÷2A→X↵ (-B + √D)÷2A→Y↵ X◢ ↵ Y◢ "-----------------"↵ "Hit enter to exit ."↵ Else ↵ "Two roots are:"↵ (-B
   - √D)÷2A→X↵ (-B + √D)÷2A→Y↵ X◢ ↵ Y◢ "-----------------"↵ "Hit enter to exit ."↵ IfEnd , Then, push "F1" or "EXE" to run the program.
   
   The screen should show the following:
   Given Ax²+Bx+C=0 A? ~Input a value for A and push enter.
   
   Repeat for B and C ,, You should get the following answers, respectively: 1, 1
   -2, 2
   -2.5,
   0.5
3. 3

   Step 3: Type in the following: "Given Ax²+Bx+C=0" Push Enter.

4. 4

   Step 4: Type the following: "A"?→A In order to get the question mark

5. 5

   Step 5: push the yellow "SHIFT" button then the "VARS" button.

6. 6

   Step 6: Repeat the previous step

7. 7

   Step 7: except use "B" and "C".

8. 8

   Step 8: On a new line

9. 9

   Step 9: type the following: "Discriminant D=" Push Enter

10. 10

    Step 10: Type the following: ((B)²-4AC)→D◢ To get the "◢" symbol

11. 11

    Step 11: push "SHIFT" then "VARS"

12. 12

    Step 12: and then "F5" under the symbol.

13. 13

    Step 13: Write the If statement.

14. 14

    Step 14: Continue writing: (-B - √D)÷2A→X Enter (-B + √D)÷2A→Y Enter X◢ Enter Y◢ Enter

15. 15

    Step 15: Type the exit message: "-----------------" (Recommended length: 17) Enter "Hit enter to exit."

16. 16

    Step 16: Continue writing.

17. 17

    Step 17: Finish it off: "-----------------" Enter "Hit enter to exit."

18. 18

    Step 18: Your code should look like this: "Given Ax²+Bx+C=0"↵ "A"?→A↵ "B"?→B↵ "C"?→C↵ "Discriminant D="↵ ((B)² - 4AC)→D◢ ↵ If (D<0)↵ Then "D<0.

19. 19

    Step 19: When you finish your program

20. 20

    Step 20: push "EXIT" to leave the coding area.

21. 21

    Step 21: Try testing out some equations: x² - 2x +1 x² - 4 (In this case

22. 22

    Step 22: b is 0) 4x² + 12x + 5

23. 23

    Step 23: Check your answers.

Detailed Guide

About the Author