つmaxima

% maxima
Maxima 5.10.0 http://maxima.sourceforge.net
Using Lisp SBCL 1.0.4
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
This is a development version of Maxima. The function bug_report()
provides bug reporting information.
(%i1) solve(x^2-5*x+6=0,x);
(%o1) [x = 3, x = 2]
(%i2)