Dengan caranya. Sederhanakan! (x + 1)² - 2(x + 1) / 4 - 4x²

[(x + 1)² - 2(x + 1)] / [4 - 4x²]
= (x + 1)[(x + 1) - 2] / 4[1 - x²]
= -(x + 1)(x - 1) / -4(1 - x²)
= -(x² - 1) / 4(x² - 1)
= -1/4