Culen of Scotland (also called Cuilean and Colin) was king of Scotland from 966 to 971. He was the son of King Indulf, and the third cousin of the previous king Dubh and of his successor Kenneth II. He was slain by the Britons of Strathclyde.
... is a repeated solution x, and this solution is real. (Geometrically, this means that the parabola described by the quadratic equation touches the x-axis in a single ...