Niccolo Tartalia
1499 (Brescia) - 1557 (Venice)

Girolamo Cardano
1501 (Pavia) - 1576 (Rome)
The Cardano Formula
The solutions of the equation X3+pX+q = 0
are of the form
  In the special case p = - 4, q = 1:

Note: We need the square root of the negative number - 687 (in Maple written as I times root of 687).