Given f(x)=4x^2+2x-9, what is f'(a)?

Question

A. f'(a)=6a+2
B. f'(a)=6a-9
C. f'(a)=8a+2
D. f'(a)=4a+2-9

Answer 1

f'(x) = 8x+2
so ...

Answer 2

It's C?

Answer 3

yea its c