How to quickly solve a quadratic equation

[DrD]

(02-18-2016 07:35 AM)MattH Wrote:  First, what exactly does the "x t theta n" button do? Most of the time it seems to give me an 'x', but a few minutes ago it was giving me an 'a' while in CAS, but now it stopped. Is there a way to get it to input different characters?

Second, what is the purpose of the 'plus or minus' symbol inside the vector brackets?

For a quick definition of key function, push [Help] and the [Keys] soft key. It will ask you to "Press the key you want help on." Very handy on-calc reference!

-Dale-