Centuries: 5th century - 6th century - 7th century
Decades: 460s 470s 480s 490s 500s - 510s - 520s 530s 540s 550s 560s
Years: 508 509 510 511 512 - 513 - 514 515 516 517 518
Births
Deaths
... square roots of both sides yields <math>x+\frac{b}{2a}=\frac{\pm\sqrt{b^2-4ac}}{2a}.</math> Subtracting b/(2a) from both sides, w ...