Question

Need help solving number 8But it says you need to find the indicated function values for the following function “f(x)=3x^2+3x-1”

Answer 1

Answer:

c.

Explanation:

We are given that:

$f\mleft(x\mright)=3x^2+3x-1$

We will proceed to obtain f(3a) as shown below:

$\begin{gathered} f\mleft(x\mright)=3x^2+3x-1 \\ when:x=3a \\ \text{Substitute this into the function, we have:} \\ f(3a)=3(3a)^2+3(3a)-1 \\ f(3a)=3(9a^2)+9a-1 \\ f(3a)=27a^2+9a-1 \\ \\ \therefore f(3a)=27a^2+9a-1 \end{gathered}$

Therefore, the answer is c