tolong yah diketahui fx=2x²-1 hitunglah nilai fungsi a) f(3) b) f(-1)+f(1) c) f(2)+f(0) tolong dijawab yah

f (x) = 2x² - 1

f (3) = 2 (3)² - 1
f (3) = 2 (9) - 1
f (3) = 18 - 1
f (3) = 17

f (-1) + f (1)
= {2 (-1)² - 1} + {2 (1)² - 1}
= (2 - 1) + (2 - 1)
= 1 + 1
= 2

f (2) + f (0)
= {2 (2)² - 1} + {2 (0)² - 1}
= {2 (4) - 1} + (-1)
= (8 - 1) + (-1)
= 7 - 1
= 6