x² - 5x - 14 = 0
D = (-5)² - 4 * 1 * (-14) = 25 + 56 = 81
x₁ = \(\frac{-(-5) + \sqrt{81}}{2 * 1} = \frac{5 + 9}{2} = \frac{14}{2} = 7\)
x₂ = \(\frac{-(-5) - \sqrt{81}}{2 * 1} = \frac{5 - 9}{2} = \frac{-4}{2} = -2\)
Больший корень: 7
Ответ: 7