Question

Someone please help me work this problem out, this is very confusing.

Answer 1

24

Explanation:

Well, f(-4) is the case in the formula when x=-4.

On that occasion, f(-4)=(-4)^2-2*(-4)=16+8=24

Answer 2

24

Explanation:

You are basically inserting -4 into the function as x. It would be (-4)^2-2(-4) You can simplify it into 16 - (-8) or 24.