Answer:
24
Step-by-step explanation:
f(x) = 6x4 – x3 + 3x2 - 5x +9
f(-1) = 6(-1)^4 – (-1)^3 + 3(-1)^2 - 5(-1) +9
f(-1) = 6 + 1 + 3+5+9 = 24
