tolong donk nomor 8 dan 10

8. f(x) = 3x² - 2x - 5
f(-1/2) = ?
f(-1/2) = 3(-1/2)² - 2(-1/2) - 5
= 3(1/4) + 1 - 5
= 3/4 - 4
= (3 - 12)/4
= -9/4
= -3 1/4 (b)

10. f(x) = x² - 1
f(n) = 24
n = ?
f(n) = n² - 1
24 = n² - 1
24 + 1 = n²
25 = n²
n = √25 = 5 (c)

maaf kalau salah
semoga membantu