Advice to buy an HP

[Marcio]

(04-21-2015 02:42 PM)Cancuino Wrote:  Hi, I've just received the 50g and I'm really pleased. I'm trying to solve the formula I have upload but I get the "invalid user function" error. I wrote the equation on the equation writer and tried to EVAL it but nothing. Any clues?.

Thank you.

Have you tried the Equation solver?

RIGHT SHIFT, 7, then pick SOLVE EQUATION.