Answer
$g(r+h)=r^{2}+2hr+h^{2}-2r-2h+5$
Work Step by Step
$g(r+h)$ =... substitute x with $(r+h)$ and simplify
$=(r+h)^{2}-2(r+h)+5$
$=r^{2}+2hr+h^{2}-2r-2h+5$
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