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1251

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

Decades: 1200s 1210s 1220s 1230s 1240s - 1250s - 1260s 1270s 1280s 1290s 1300s

Years: 1246 1247 1248 1249 1250 - 1251 - 1252 1253 1254 1255 1256

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Quadratic formula

... remain correct if the coefficients a, b and c are complex numbers, or more generally members of any field whose characteristic is not 2. (In a field of characteristic 2, ...