Secret trick

To celebrate such pathetic grades for my GEM CA test, I will release the secret "quadratic solving" function of casio's fx-570s calculator.

Step 1.. switch it on of course..
2. Select mode until it goes until ENG
3. This is the really fun part. SIMULTANEOUSLY press MODE, 5, 6 buttons down.
4. If successful, you will see a screen with 1, 2, 3. If i'm not wrong, 2 is for polynomial of degree 2. Which is the most common anyway :)
5. a = Coefficient of the x squared term. b = coefficient of x term. c = constant term.
6. Press equal to find the respective values of x!!!! (*GASP*)
7. Press mode, then 1 to go back to your normal calculator mode.

Muahaahahaa