Diketahui fungsi f (x) = 3x²-2x-5. Nilai f ( -1 per 2 ) =?? tolong yang tau dijawab dong+caranya yah

f(-1/2) = 3(-1/2)² - 2(-1/2) - 5
         = 3/4 + 1 - 5
         = 3/4 - 4
         = 3/4 - 16/4
         = -13/4

f (x) = 3x²-2x-5
f (-1/2) = 3 (-1/2)^2 - 2 (-1/2) - 5
= 3 (1/4) + 1 - 5
= 3/4 - 4
= -3 1/4