Question

Evaluate f(3) for the function f(x) = 3x^2 + 2x - 5.

Answer 1

f(3) = 28

Step-by-step explanation

We have the function:

`f(x)=3x^2\text{ + 2x - 5}`

To find the value of f(3), we have to replace x with 3 in the function and simplify:

`\begin{gathered} f(3)=3(3)^2\text{ + 2(3) - 5} \\ f(3)\text{ = (3 }\cdot\text{ 9) + 6 - 5 = 27 + 6 - 5} \\ f(3)\text{ = }28 \end{gathered}`

That is the value of f(3).