Question

For f(x) = 4x2 + 9. then find f (x) = -2.+171625-1

Answer 1

To evaluate a function or expression, just substitute the value of x to the function.

From the given function :

`f(x)=4x^2+9`

Substitute x = -2

`\begin{gathered} f(-2)=4(-2)^2+9 \\ =4(4)+9 \\ =16+9 \\ =25 \end{gathered}`

Therefore, the correct answer is 25