BEGINNER
So this has to be one of the easier formulas to create on a graphing calculator. I decided to start with this one because it is a good basis to start with. Anyway, let's begin.
Create a new program and name it "QUADFORM" (8 characters is the max a name can be)
Press "prgm" and go to the "I/O" tab
Find "Prompt" and press "enter" on it
Press "alpha" (to get to letters), find the button with "A" above it, and press it. Then press comma.
Repeat step 4 with "B" and "C". It should look like this: :Prompt A,B,C
Press "enter" to start a new line, then copy this formula into your calculator (The "→" is gotten from pressing "sto→", above "on") :(-B+√(B²-4AC))/(2A)→X :(-B-√(B²-4AC))/(2A)→Y
Press "enter" to start a new line again. Press "prgm", go to "I/O" again, find "Disp" and hit enter on it.
Put another "A" next to it, press comma, and put "B" after it, like so: :Disp A,B
So this is what your final program should look like:
:Prompt A,B,C
:(-B+√(B²-4AC))/(2A)→X
:(-B-√(B²-4AC))/(2A)→Y
:Disp A,B
Thank you for taking the time to look at this. Give the page a like if it was helpful, or drop a comment below if you have a question or need help.
~Nate