Decades: 540s BC 530s BC 520s BC 510s BC 500s BC - 490s BC - 480s BC 470s BC 460s BC 450s BC 440s BC
499 BC - 498 BC 497 BC 496 BC 495 BC 494 BC
Deaths
Events
... equation touches the x-axis in a single point.) If the discriminant is positive, then there are two different solutions x, both of which are real. (Geometrically, ...