х² + 6х - 27 = 0,
Д = 6² - 4*1*(-27) = 36 + 108 = 144,
х1 = (-6 + 12) / 2*1 = 6/2 = 3,
х2 = (-6 - 12) / 2*1 = -18/2 = -9
х² + 6х - 27 = 0,
Д = 6² - 4*1*(-27) = 36 + 108 = 144,
х1 = (-6 + 12) / 2*1 = 6/2 = 3,
х2 = (-6 - 12) / 2*1 = -18/2 = -9