Parabola problem

Joni Sievola wrote: Hello, I'm having a problem with defining parabola's function f(x) when a,b,c are unknown. I can solve a,b,c with given/find-procedure but I have no idea how could I make mathcad to give me the function included these now known a,b,c (something like: f(x) = 4x^2 +3x + 1) I attached my work so far so maybe it's easier for you to understand what I meant above. I would be very pleased if someone could help me out as soon as possible. Sincerely, Joni (btw I'm using mathcad 15)

You simply write the function down pretty much as you have it above!

f(x):=a*x^2+b*x+c

and that's that.

As you've used x as a variable already, if you want to plot it in 2D, then you'll have to plot it against a different variable (doesn't matter what as long as it's not x, y, a, b or c.

Stuart