36x²-4(3x-1)² = 36x²-4(9x² - 6х + 1) = 36x² - 36x² + 24х - 4 = 24х - 4
36x²-4(3x-1)² = (6x)² - (2*(3x-1))² = (6x + 6x-2)*(6x - 6x+2) = 24х - 4
36x²-4(3x-1)² = 36x²-4(9x² - 6х + 1) = 36x² - 36x² + 24х - 4 = 24х - 4
36x²-4(3x-1)² = (6x)² - (2*(3x-1))² = (6x + 6x-2)*(6x - 6x+2) = 24х - 4