9x^2-12x-4 корни уравнения

9x^2 - 12x - 4 = 0

a=9, b=-12, c=-4

k = b/2 = - 12/2 = - 6

D1 = k^2 - ac = (-6) ^2 - 9 * (-4) = 36 + 36 = 72 > 0

x1 = - k + √72/a = 6+√72/a = 6+2√18/9;

x2 = - k - √72/a = 6-√72/a = 6 - 2√18/9;

Ответ: 6+2√18/9; 6 - 2√18/9;