Решите уравнение: a) (4x - 3)(4x + 3) - (4x - 1)² = 3x; б) 16c² - 49 = 0.

a) (4x - 3)(4x + 3) - (4x - 1)² = 3x 16x² - 9 - (16x² - 8x + 1) = 3x 16x² - 9 - 16x² + 8x - 1 = 3x 8x - 10 = 3x 5x = 10 x = 2 Ответ: x = 2 б) 16c² - 49 = 0 16c² = 49 c² = \(\frac{49}{16}\) c = ±\(\sqrt{\frac{49}{16}}\) = ±\(\frac{7}{4}\) Ответ: c = ±\(\frac{7}{4}\)