Potosi is a department and city in Bolivia. At one time, Potosi boasted the largest tin mine in the world. It is also home of Salar de Uyuni[?], the largest salt flat[?] in the world.
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... quadratic formula expresses the explicit solution(s) x to the quadratic equation
<math>ax^2+bx+c=0</math>
in terms of the coefficients a, b and c, which ...