newbie question, real positive solutions of an equation



On Thu, 7 Dec 2006, Mario Rodriguez wrote:

> El jue, 07-12-2006 a las 09:11 +0100, Hugo Coolens escribi?:
>> I'm using Maxima to solve some equations, which Maxima does very well.
>> Maxima shows me _all_ the roots: positive, negative, zero and
>> complex.
>> I suppose there must be a method to show only the roots which are
>> real and positive. Or maybe it is possible to make Maxima look only for
>> the positive ones thus not wasting time looking for complex and negative
>> roots?
>> Can anyone here tell me how to accomplish this?
>
> To get only real solutions,
>
> realonly:true$
> algsys([x^2+x+1],[x]);
Thanks, this already eliminates complex roots. How can I select only the 
positive roots?

regards,
hugo