## Encyclopedia > 1216

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# 1216

Centuries: 12th century - 13th century - 14th century

Years: 1211 1212 1213 1214 1215 - 1216 - 1217 1218 1219 1220 1221

Events

Births

Deaths

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 Quadratic formula ... The formula reads $x=\frac{-b \pm \sqrt {b^2-4ac}}{2a}$ The term b2 – 4ac is called the discriminant of the quadratic equation, ...

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