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Johann Gottfried Galle

Johann Gottfried Galle, astronomer at the Berlin Observatory[?] who, from help from LeVerrier, sighted Neptune on September 23, 1846.



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Quadratic formula

... a single point.) If the discriminant is positive, then there are two different solutions x, both of which are real. (Geometrically, this means that the parabola ...

 
 
 
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