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).
... To "complete the square" is to add a constant (i.e., in this case, a quantity that does not depend on x) to the expression to the left of "=", that will make it a perfect ...