31. In the 12th century, the Indian mathematician Bhaskara II attempted the solution of cubic equations without general success. 32. Since cubic equations and quadratic equations are somewhat similar, do cubic equations also have a discriminant and formula? 33. Bombelli had the foresight to see that imaginary numbers were crucial and necessary to solving quartic and cubic equations . 34. Later, Tartaglia was persuaded by Gerolamo Cardano ( 1501 1576 ) to reveal his secret for solving cubic equations . 35. He called them " fictitious " during his attempts to find solutions to cubic equations in the 16th century. 36. In all, Cardano was driven to the study of thirteen different types of cubic equations ( chapters XI XXIII ). 37. This results in the following cubic equation for [ H + ], which can be solved either numerically or analytically: 38. If we are dealing with a cubic equation whose coefficients belong to some field ( whose field of algebraic numbers. 39. In 1936 Margharita P . Beloch showed how Lill's method could be adapted to solve cubic equations using paper folding. 40. Dionysodorus is remembered for solving the cubic equation by means of the intersection of a rectangular hyperbola and a parabola.
