Answer:
The value of f(9) is equal to 498.
Step-by-step explanation:
Given that,
f(x) = 6x²+12
We need to find the value of x(9).
Put x = 9 in the given function.
f(9) = 6(9)²+12
f(9) = 498
So, the value of f(9) is equal to 498.