nilai [tex] \frac{lim}{x \infty } ( \sqrt{25x {}^{2} + 10x - 6 } - 5x - 2)[/tex]

limit gk saya tulis
= √(25x² + 10x - 6) - (5x + 2))
= √(25x² + 10x - 6) - √(5x + 2)²
= √(25x² + 10x - 6) - √(25x² + 20x + 4)
a = 25, b = 10, c = -6 dan d = 20
dg rumus (b - d)/(2√a)
= (10 - 20)/(2√25)
= -10/10
= -1