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655

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

Decades: 600s 610s 620s 630s 640s - 650s - 660s 670s 680s 690s 700s

Years: 650 651 652 653 654 - 655 - 656 657 658 659 660


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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 ...

 
 
 
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