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1518

Centuries: 15th century - 16th century - 17th century

Decades: 1460s 1470s 1480s 1490s 1500s - 1510s - 1520s 1530s 1540s 1550s 1560s

Years: 1513 1514 1515 1516 1517 - 1518 - 1519 1520 1521 1522 1523

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Quadratic formula

... left side is now a perfect square; it is the square of (x + b/(2a)). The right side can be written as a single fraction; the common denominator is 4a2. We ...