If f(x) = 2x^2 + 1, what is f(x) when x = 3?

To find f(x) when x = 3, we need to substitute 3 into the function f(x) = 2x² + 1.

First, we calculate x²:

3² = 9

Next, we multiply this result by 2:

2 * 9 = 18

Finally, we add 1 to this value:

18 + 1 = 19

So, f(3) = 19.

In conclusion, when x is 3, the value of f(x) is 19.