Корень из -3x^2-7x+6
-3x^2 - 7x + 6 = 0 | * (-1) 3x^2 - 7x - 6 = 0 D = 49 + 4*3*6 =121 = 11 7 + 11/ 6 = 3 7 - 11/6 = 0.6