### cubic and quartic roots

Publié :

**mar. mars 13, 2018 12:13 pm**Hello,

could Giac use Cardano (Ferrari) formula to obtain roots of cubic (resp. quartic) equations? Thus the solutions of e.g. x^3-x-1=0 would be both exact and readable. Also, a primitive function of e.g. 1/(x^3-x-1) could be computed. Rootofs are practical when dealing with complicated roots, but it would be nice to obtain an algebraic representation when possible.

could Giac use Cardano (Ferrari) formula to obtain roots of cubic (resp. quartic) equations? Thus the solutions of e.g. x^3-x-1=0 would be both exact and readable. Also, a primitive function of e.g. 1/(x^3-x-1) could be computed. Rootofs are practical when dealing with complicated roots, but it would be nice to obtain an algebraic representation when possible.