A function is given. Determine the average rate of change of the function between the given values of the variable.
$f(x) = 2 − x^2 $
$x = 8, x = 8 + h$
I solved for $f(8)$ and got $-62$...
I need help solving for $f(8+h)$. I get down to $2-(h^2+16h+64)$ and I don't know what to do after that; no matter what I try I get stuck. I know how to do the rest after that (plug it into the formula: change in y / change in x and simplify).