Extremadura is a province in Spain, but there is no article on it. Ortolan88 10:03 Jul 27, 2002 (PDT)
... b/(2a) from both sides, we get <math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math> ...