Help with solve()

[Tim Wessman]

(03-31-2017 02:07 PM)AngryNapkin Wrote:  Trying to do a simple
solve(3*x^2+3*x=5,x)

As for the reasoning why, A-Z in capital letters are "real number" variables. They contain by default a 0.

So in essence, evaluating what you have written is:

solve(3*0^2+3*0=5*0,0)

The basic rule is this - if you are just working with plain numbers, and want everything evaluated to an approximate numerical value, work in home. If you are working with "unknown" variables and want expression results, work in the CAS screen.