Question

Х (в квадрате) -8=2х

Answer 1

x^2 - 8 = 2x, x^2 - 2x - 8 = 0, D = (-2)^2 - 4*1*(-8) = 4 + 32 = 36, x1 = (2 + 6) / 2*1 = 8 : 2 = 4, x2 = (2 - 6) / 2*1 = - 4 : 2 = - 2. Ответ: - 2; 4