Question

Решить уравнение 3x^2-28x+9=0.

Answer 1

D = 784 - 4( 3 * 9) = 784 - 108 = 676
x1 = (28 - 26)/6 = 2/6 = 1/3
x2 = (28 + 26)/6 = 54/6 = 9
Ответ: 1/3 и 9