Answer
$$2\left(r+5\right)^2-50$$
Work Step by Step
Completing the square, we obtain:
$$ 2\left(r^2+10r+5^2-5^2\right) \\ 2\left(\left(r+5\right)^2-5^2\right) \\ 2\left(r+5\right)^2-50$$
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