Question

What is f(3) for the quadratic function

f(x)=2x2 + x – 12?
F -3
G 3
H 6
I. 9​

Answer 1

f(3) = 9

Explanation:

Wherever you see an x on the right, put a 3 in for that x

f(x) = 2x^2 + x - 12

f(3) = 2*(3)^2 + 3 - 12

f(3) = 2*9 + 3 - 12

f(3) = 18 + 3 - 12

f(3) = 9