(continue with 1975)
Austrian Offices in Crete[?] 1903-1914. all
Austrian Offices in the Turkish Empire[?] 1867-1914, all
... reads <math> x=\frac{-b \pm \sqrt {b^2-4ac}}{2a} </math> The term b2 – 4ac is called the discriminant of the quadratic equation, because it ...