Question

If f(x) = x2 + 2, find f(4).

Answer 1

is this f(x) = x^2+2 or f(x) = 2x + 2 ?
Either way you, replace x with 4 when it says If f(x) =..., find f(4)

f(x) = x^2 + 2
4^2 +2
16 + 2
= 18

f(x) = 2x + 2
2(4) + 2
8 + 2
= 10

Answer 2

the last one

Answer 3

as long as the x and two stay on the same side with each other it doesn't matter which order you place it. hope that wasn't confusing.