Amberley Working Museum is a museum in Amberley, Arundel, West Sussex, England. It was founded in 1979 and is a 36 acre open air museum, next to Amberley Railway station.
Its collections include narrow gaugerailway, concrete, omnibus, communications, natural history, roadmaking, BT....
... b2 – 4ac is called the discriminant of the quadratic equation, because it discriminates between three qualitatively different cases:
If the discriminant is zero, ...