In my university level history of mathematics course I have encountered the following problem, I have to admit I am stuck!
Solve the following cubic function using Cardanos method: x3 + 3x = 2
(Cardano, Ars magna, Caput XI, De Cubo & rebus aequalibus Numero.)
Also calculate an approximation with three decimals (using the method)
Any help would be much appreciated!