How to do this question?

Step-by-step explanation:

Knowing that f(x) = 2x^2 - x - 4 and f^2(x) means f(f(x)), we get:

f^2(x) = f(f(x)) = 2(2x^2 - x - 4)^2 - (2x^2 - x - 4) - 4

You have to square the whole thing... You'll get a 4th degree equation. I know it's a bit boring but whatever.

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: