(6x - 1)² - 4(3x + 2)(3x - 2) = 65
a² - b² = (a - b)(a + b)
(a - b)² = a² - 2ab + b²
36x² - 12x + 1 - 4(9x² - 4) = 65
36x² - 12x - 36x² + 16 = 64
-12x = 48
x = -4
(6x - 1)² - 4(3x + 2)(3x - 2) = 65
a² - b² = (a - b)(a + b)
(a - b)² = a² - 2ab + b²
36x² - 12x + 1 - 4(9x² - 4) = 65
36x² - 12x - 36x² + 16 = 64
-12x = 48
x = -4