(adsbygoogle = window.adsbygoogle || []).push({}); For this you need to have a TI-82 or up calculator. I'm assuming most people will probably have the TI-83+ so I'm going to make the tut for that. If you have a different model the coding is probably either the same, or slightly different (for example I have a ti-89 titanium as well, and the coding is almost exactly the same).


1. Click the PRGM button.
2. Go to "New" and create a new program.
3. Name it "QUADEQ" or something to that effect.
4. There are a couple commands that you will need. To find the list of commands, click the PRGM button again. The "→" symbol is the store (STO→ command and can be found right above the ON button. The = sign can be found by pressing 2nd and then MATH.
5. Enter this code exactly:

    :ClrHome

isp  "FOR AX^2+BX+C=0:"

rompt A

rompt B

rompt C

:√(B^2-4*A*C)→

-B+D)/(2*A)→M

-B-D)/(2*A)→N

isp  "SOLUTIONS:",M,N

:

6. Press 2nd MODE to quit.
7. Press PRGM and open the program you just made under the EXEC tab.
8. Now when you have a quadratic equation in standard form (ax^2+bx+c=0) just enter the values of a, b, and c.
9. Test it out to see if it works. Try a simple equation like x^2+2x+1=0 (so you would enter 1, 2, and 1 in the calculator). The answers for that one should be -1 and -1.

dude lol. that would be so helpful in school