x2 - 7x + 10 = 0 D = b2 - 4ac D = 49 - 40 = 9 = 3^2 x1,2 = -b ± √D/2a x1 = 7 + 3/2 = 10/2 = 5 x2 = 7 - 3/2 = 4/2 = 2 Ответ: x1 = 5; x2 = 2