Batman was released in 1966, and was later to acquire the video-box title Batman: The Movie. It starred Adam West[?] as Batman, and Burt Ward[?] as Robin. It featured many of the criminals seen in the Batman TV-series from the 1960s, including Cesar Romero[?] as The Joker, Frank Gorshin[?] as The Riddler, Burgess Meredith[?] as The Penguin and Lee Merriwether[?] as Catwoman. It was directed by Leslie H. Martinson who won a Golden Gryphon[?] for his efforts.
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... 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 are complex ...