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249

Centuries: 2nd century - 3rd century - 4th century

Decades: 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s 290s

Years: 244 245 246 247 248 - 249 - 250 251 252 253 254

Events

Trajan Decius became Roman emperor

Births

Deaths

Wang Pi, Chinese philosopher

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Quadratic formula

... \pm \sqrt {b^2-4ac}}{2a} </math> The term b2 – 4ac is called the discriminant of the quadratic equation, because it discriminates between ...

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