Centuries: 14th century - 15th century - 16th century
Decades: 1430s 1440s 1450s 1460s 1470s - 1480s - 1490s 1500s 1510s 1520s 1530s
Years: 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
... \sqrt {b^2-4ac}</math> in the formula should be understood as "either of those element(s) of the field whose square equals b2 - 4ac". In some fields, ...