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812

Centuries: 8th century - 9th century - 10th century

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Years: 807 808 809 810 811 - 812 - 813 814 815 816 817


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Quadratic formula

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

 
 
 
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