Question

F(x) = -3x² - 2x how to find f (8)

Answer 1

Answer:

-208

Step-by-step 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.

Answer 2

Answer:

f(8) = -208

Step-by-step 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.