hp 50 g simplify solutions

[peacecalc]

Hello all,

thank you for your answers. Believe me, I don't want to start a philosophical disputation about: what is simple?

The equation x^4-16=0 has four simple solutions. So I thought as a simple mind, it might be possible that a CAS is able to reduce it to a simple complex number.

In my eyes an expression A is more simple than expression B, if A has less numbers and operators representing a solution then B (and it is supposed that then A is easier readable like B).

I'm not familiar with CAS programming, why such kind of simplifying (there are no variables at all) is for a CAS a hard piece of cake ?

greetings
peacecalc