The 14 "eight-thousanders[?]", 8,000 m or higher, all in the Himalayas:
By continent:
Europe
Asia
North America
South America
Africa
Oceania
Antarctica
Mars
See also: Mountain range, List of mountain ranges, List of volcanoes
... non-zero. These solutions are also called the roots of the equation. The formula reads <math> x=\frac{-b \pm \sqrt {b^2-4ac}}{2a} </math> The term b2 ...