Помогите!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11
-x^2 - 10x - 18 = 0 x^2 + 10x + 18 = 0 D = 100 - 4*18 = 100 - 72 = 28 x =