Franc Frakelj[?] - member of collaborational White Guard - 2nd World War war criminal (never convicted, died in Canada).
Leon Rupnik[?] (1880 - 1946) - general, commander of collaborational Slovenian home guard - 2nd World War war criminal (convicted, executed by shooting).
... "=", that will make it a perfect square trinomial of the form x2 + 2xy + y2. Since "2xy" in this case is (b/a)x, we must have y = b/(2a), so we add the square of b/(2a) to ...