Determine the value of the function for a specific value of x: 4) $f(x)=8 x^{3}+4 x^{2}-9$

Step 1 ：The question asks for the value of the function \(f(x)=8 x^{3}+4 x^{2}-9\) for a specific value of x. However, the specific value of x is not provided in the question. Let's assume that we need to find the value of the function for x = 2.

Step 2 ：Substitute x = 2 into the function.

Step 3 ：Calculate the value of the function: \(f(2) = 8*(2)^{3}+4*(2)^{2}-9 = 71\)

Step 4 ：Final Answer: For x = 2, the value of the function \(f(x)=8 x^{3}+4 x^{2}-9\) is \(\boxed{71}\).