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623

Centuries: 6th century - 7th century - 8th century

Decades: 570s 580s 590s 600s 610s - 620s - 630s 640s 650s 660s 670s

Years: 618 619 620 621 622 - 623 - 624 625 626 627 628


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Quadratic formula

... this means that the parabola described by the quadratic equation touches the x-axis in a single point.) If the discriminant is positive, then there are two different ...

 
 
 
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