№3. Решите уравнение: (5x + 3)² - (5x-1)(5x + 1) = 8

(5x + 3)² - (5x - 1)(5x + 1) = 8 25x² + 30x + 9 - (25x² - 1) = 8 25x² + 30x + 9 - 25x² + 1 = 8 30x + 10 = 8 30x = -2 x = -2/30 x = -1/15 Ответ: \(x = -\frac{1}{15}\)