(2×-1)²=(4×+3)².tolong carikan jawaban&caranya saya masih bingung

(2x - 1)² = (4x + 3)²
(2x - 1)(2x - 1) = (4x + 3)(4x + 3)
4x² - 2x - 2x + 1 = 16x² + 12x + 12x + 9
4x² - 4x + 1 = 16x² + 24x + 9
4x² - 16x² - 4x - 24x + 1 - 9 = 0
-12x² - 28x - 8 = 0 =====> bagi (-4)
3x² + 7x + 2 = 0
(3x + 1)(x + 2) = 0
x = -1/3 atau x = -2