Решите уравнение: (5x - 1)(x + 2) + 3(x-4)(x + 4) = 2(2x + 3)² - 8.

(5x - 1)(x + 2) + 3(x-4)(x + 4) = 2(2x + 3)² - 8 5x² + 10x - x - 2 + 3(x² - 16) = 2(4x² + 12x + 9) - 8 5x² + 9x - 2 + 3x² - 48 = 8x² + 24x + 18 - 8 8x² + 9x - 50 = 8x² + 24x + 10 9x - 50 = 24x + 10 -60 = 15x x = -4