Re: HP Prime  Saved formulas, expressions Message #2 Posted by Eddie W. Shore on 4 Oct 2013, 11:23 p.m., in response to message #1 by CR Haeger
Two things with Shift+Define:
1. The arguments come in the order where the variable is first seen. Plan your function carefully.
Using your example, if I use the Define feature to define POLY as
X^2 * A + X * B + C
Then POLY uses the following arguments in this order: POLY(X, A, B, C)
2. Functions made with Define take numerical arguments only. The only exception I found was to use this in the Solver.
Using the POLY example:
In the Solver App set E1 as POLY(X,A,B,C) = R. (R is for the result, leave this out if you want to solve POLY(X,A,B,C)=0). You will be able to solve for only one of the variables at a time.
Hope this helps.
