John or Johann SigismundHohenzollern (1572-1619) succeeded his father Joachim Friedrich as margrave of Brandenburg and duke of Prussia in 1608. He became in addition duke of Cleve in 1614, holding all three titles until his death. His son and successor was Georg Wilhelm, born in 1595.
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The term b2 – 4ac is called the discriminant of the quadratic equation, because it discriminates between three qualitatively ...