Encyclopedia > 39th century BC

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39th century BC

(40th century BC - 39th century BC - 38th century BC - other centuries)

(5th millennium BC - 4th millennium BC - 3rd millennium BC)


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Inventions, Discoveries, Introductions:



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Quadratic formula

... by the quadratic equation touches the x-axis in a single point.) If the discriminant is positive, then there are two different solutions x, both of which ...

 
 
 
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