On Fri, Apr 2, 2010 at 10:11 AM, bb <bblo...@arcor.de> wrote:
> Why does Sage not solve the equation? (The quadratic equation is just a
> test.)
>
> sage: x,y,a,b = var('x, y, a, b')
> sage: solve([x - 2*y == a, x + 3*y == b],[x,y]);
> sage: solve([x^2 + a*x + b == 0],x)
> [x == -1/2*a - 1/2*sqrt(a^2 - 4*b), x == -1/2*a + 1/2*sqrt(a^2 - 4*b)]
> sage: solve([x - 2*y - a == 0, x + 3*y -b == 0],[x,y]);
> sage: solve([x - 2*y - a == 0, x + 3*y -b == 0],x,y);
> sage:
Semicolons surpress printing:
sage: solve([x - 2*y - a == 0, x + 3*y - b == 0],[x,y])
[[x == 3/5*a + 2/5*b, y == -1/5*a + 1/5*b]]
sage: 2+2;
sage: 2+2
4
>
> Maxima delivers the solution:
>
>
> 2 b + 3 a a - b
> (%o2) [[x = ---------, y = - -----]]
> 5 5
>
>
> --
> To post to this group, send email to sage-support@googlegroups.com
> To unsubscribe from this group, send email to
> sage-support+unsubscr...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/sage-support
> URL: http://www.sagemath.org
>
> To unsubscribe, reply using "remove me" as the subject.
>
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
--
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URL: http://www.sagemath.org
