# Chapter 3 - Quadratic Functions - Exercises for Skills for Completing the Square - Page 138: 3

$$2\left(r+5\right)^2-50$$

#### 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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