Decades: 1550s BC 1540s BC 1530s BC 1520s BC 1510s BC - 1500s BC - 1490s BC 1480s BC 1470s BC 1460s BC 1450s BC
Significant People
... the formula should be understood as "either of those element(s) of the field whose square equals b2 - 4ac". In some fields, some elements have no square roots and some ...