Question

Решите уравнение: x^2 - 7x - 18 = 0

Answer 1

$x {}^{2} - 7x - 18 = 0 \ d = 49 + 72 = 121 \ x1 = frac{7 + 11}{2} = 9 \ x2 = frac{7 - 11}{2} = - 2$
Ответ: -2; 9