17. 10x² - 3x - 1 = 0

a = 10, b = -3, c = -1 D = (-3)² - 4 * 10 * (-1) = 9 + 40 = 49 x₁ = (3 + √49) / 2 * 10 = (3 + 7) / 20 = 10 / 20 = 1/2 x₂ = (3 - √49) / 2 * 10 = (3 - 7) / 20 = -4 / 20 = -1/5 Ответ: x₁ = 1/2, x₂ = -1/5