In Egyptian mythology, Apep was a monster that lived in the underworld. Every night, he tried to kill Re (the sun god) but was stopped by Set and Mehen. Re (or Set) eventually killed him.
Alternative: Apophis, Apepi, Aapep
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... the discriminant is zero, then there is a repeated solution x, and this solution is real. (Geometrically, this means that the parabola described by the quadratic equation ...