(Note that this list still lacks many important ships.)
(The HMS Pinafore was a fictional creation of Gilbert and Sullivan.)
... get <math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math> Generalizations The formula and its proof remain ...