katenemch15 @ 29.3.2009, 0:14
the discriminant of a quadratic equation is obtained by the quadratic equation itself ...
So it should be, because we decide in a general way. Just express the roots now by substituting the discriminant into formulas. Then write down the sum of squares of roots, open brackets, bring similar ones, and you will get another square. triple with D>0. Then you need to find its minimum, equating the derivative to zero and finding the solution to the usual linear equation. This decision will be the minimum, that is, the answer to your problem.Post has been editedpaladin7 - 29.03.09, 00:57