Question

Решите уравнение . Срочно ​

Answer 1

$x^2 - x - 30 > 0\\D = b^2 - 4ac = (-1)^2 - 4 * 1 * (-30) = 1 + 120 = 121\\\sqrt{D} = 11\\x = \frac{-b ± \sqrt{D} }{2a}\\x_1 = \frac{1+11}{2} = 6\\x_2 = \frac{1 - 11}{2} = -5$