## Calculus with Applications (10th Edition)

$f(2-r)=6r^{2}-24r+22$
$f(2-r)=$ ... substitute x with $(2-r)$ and simplify $=6(2-r)^{2}-2$ $=6(4-4r+r^{2})-2$ $=24-24r+6r^{2}-2$ $=6r^{2}-24r+22$