Please read the material I pointed you to more carefully before sending
more messages.
Here is the example from the top of the first result in the link I sent you:
(%i2) load(to_poly_solver)$ <<<<< important
Loading maxima-grobner $Revision: 1.6 $ $Date: 2009-06-02 07:49:49 $
(%i3) %solve([x^2 + 2*x=3, 7*x+2<-x-3],[x]);
(%o3) %union([x=-3])
If for some reason you want to use solve_rat_ineq instead, you need to
load that, but I would recommend sticking with %solve, which is more
powerful.
-s
On Fri, Nov 23, 2012 at 4:57 PM, Antonio Lapira <antoniolapira at yahoo.it>wrote:
> I tried but nothing happens
>
> solve_rat_ineq(7*x<-3);
> (%o35) solve_rat_ineq(7*x<-3)
>
> maxima --version
> Maxima 5.21.1
>
> could you please indicate a working example?
>
> many thanks
>
>
> --- *Ven 23/11/12, Stavros Macrakis <macrakis at alum.mit.edu>* ha scritto:
>
>
> Da: Stavros Macrakis <macrakis at alum.mit.edu>
> Oggetto: Re: [Maxima] solve inequalities
> A: "Antonio Lapira" <antoniolapira at yahoo.it>
> Cc: maxima at math.utexas.edu
> Data: Venerd? 23 novembre 2012, 21:07
>
> http://bit.ly/WHnOJc
>
> On Fri, Nov 23, 2012 at 3:53 PM, Antonio Lapira <antoniolapira at yahoo.it<http://mc/compose?to=antoniolapira at yahoo.it>
> > wrote:
>
> how to solve inequalities?
> I tried with:
> solve([2*x>12], [x]);
> but doesn't work
> [2*x>12=0]
>
> I'd like to get x>6
>
> thanks
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