Question

F(x) = -3x² - 2x

how to find f (8)

Answer 1

f(8) = -208

Explanation:

Apply 8 into the equation

f(8) = -3(8)² - 2(8)

= -192 - 16

= -208

8 will be your x value since it's implied within the question itself.

Answer 2

-208

Explanation:

Given function:

`\text{f}(x)=-3x^2-2x`

To find f(8), substitute x = 8 into the function:

`\begin{aligned}\text{f}(x) & =-3x^2-2x\\\implies \text{f}(8) & =-3(8)^2-2(8)\\& =-3(64)-2(8)\\& =-192-16\\& = -208\end{aligned}`

Therefore, f(8) = -208.