Gerolamo Cardano, two years after accepting a…

Gerolamo Cardano, two years after accepting a professorship in medicine at Pavia in 1543, reveals Niccolo Tartaglia's solution of the cubic equation—which he had promised not to do—in his Ars magna (“The Great Art”), the first great Latin treatise on algebra.

He also reveals the solution of the quartic equation found by Cardano's former servant, Ferrari.