Question

Find f(4).

f(x) = x2 + 2x - 3
A) 5
B) 11
C) 13
D) 21

Answer 1

D) 21

Explanation:

1st- You plug in 4 into every place where there is an x. (4)^2+2(4)-3. After entering it into the calculator you should get 21.

2nd- I had this on USATestprep and this was the correct answer.