Kennedy Platz, formerly Rudoph-Wilde-Platz, in Berlin-Schoeneberg contains the city hall (Rathaus Schoeneberg). It was the square in which US President John F. Kennedy gave his famous speech to the Berliners, in which he stated : "Ich bin ein Berliner".
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... (Geometrically, this means that the parabola intersects the x-axis in two points.)
If the discriminant is negative, then there are two different solutions x, both of which ...