If you try to simplify, you might see that the imaginary
parts drop out.
if k is the list of roots, do
map(rectform,k);
radcan(%);
%,numer;
at least this worked in commercial macsyma.
But it would be nice if it got them in purely real
form.
stanevm@mail.uctm.edu wrote:
> Hello,
> the function f(x):=x^3-10*x^2+28.5*x-21
> has three real roots in [0,6]
> but solve(f(x),x)
> gives one real and two complex.
> M.At.Stanev
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