Question

F(x) = 2x2 + 1, what is f(x) when x = 3?

Answer 1

f(3) = 19

Explanation:

Substitute 3 for x.

f(3) = 2(3)² + 1

f(3) = 2(9) + 1

f(3) = 18 + 1

f(3) = 19