Calculus itself is fairly easy. It's the really ******* insanely difficult algebra and trig that will eventually make calculus somewhat difficult at points.
When I first got my graphing calculator, (and I'm sure plenty of you have done this, too) I just programmed the quadratic formula into the functions and all I had to do was provide A, B, & C, and it would give me the answer(s). Teachers were baffled at how fast I went through those problems...
The programming differs slightly depending on the calculator, but should work for most TI's. Might have to adjust the program a bit. Here we go.
Create a new program on your calculator. This is done by pushing the "PRGM" button on your calculator, then scrolling over to "New." Hit "Enter" to create a new program. Title the program "QUADFORM."
Press "PRGM" then scroll to "I/O" and press 3 to get "DISP." Then press "2nd" "Alpha" to Alpha Lock your calculator and type "ENTER A" (make sure you include the quotation marks on each side of ENTER A).
Press "PRGM" then scroll to "I/O" and press 1 to get "Input." Then press "Alpha" and "Math" to get the letter A to appear. You do not need quotation marks around the A in this case.
Repeat steps 2 and 3 two more times, replacing A with B and then with C so the next four lines in the calculator program read: Disp "ENTER B", Input B, Disp "ENTER C", Input C.
Type in the square root followed by B^2-4AC)->D. The square root will automatically open parenthesis for you, so you will need to close them after the C. The B^2 can be input as B^2 or as B squared. The -> sign is found above the "ON" button where it says "STO->".
Press in the following: (-B)/(2A)->I. Where the - before the B is the negative sign, NOT the minus sign.
Type in the following on the next line: (D)/(2A)->F Then type in the following on the line after that: (-D)/(2A)->S
Press "PRGM" then scroll over to "I/O" and press 3 for "Disp." Then type in I+F, I+S. This will give you the results of the quadratic formula when you use the program.