TY - JOUR T1 - Kvadratické rovnice a nerovnice A1 - Doboš, Jozef JA - Obzory matematiky, fyziky a informatiky Y1 - 2002 VL - 31 IS - 4 SP - 10 EP - 18 SN - 1335-4981 N2 - Most of the quadratic equations and inequalities you will encounter in problem books can be solved by elementary methods. ER -