Re: [fricas-devel] Re: [Axiom-math] Selection of roots

[Martin Rubey]

Alejandro Jakubi <address@hidden> writes:
> Now, my next question is about selecting the two real roots out of the four
> produced by 'radicalSolve' here:
> 
> f:=(x^3+x^2-4*x-4)/(2*x^2+7*x-4)
> fp:=differentiate(f,x)
> radicalSolve(fp,x)
> 
> The problem is that
> 
> allRootsOf(fp)$RealClosure(Fraction Integer)

try

allRootsOf(numer fp)$RealClosure(Fraction Integer)

Martin