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569

Centuries: 5th century - 6th century - 7th century

Decades: 510s - 520s - 530s - 540s - 550s - 560s - 570s - 580s - 590s - 600s - 610s

Years: 564 565 566 567 568 569 570 571 572 573 574

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Quadratic formula

... different cases: If the discriminant is zero, then there is a repeated solution x, and this solution is real. (Geometrically, this means that the parabola ...