## Algebra 1: Common Core (15th Edition)

$\frac{(2r−1)}{(r+5)}$ The denominator is zero when r=-5.
Converting numerator and denominator from quadratic equation into a product of two linear equations, we get $\frac{(2r−1)(r+5)}{(r+5)(r+5)}$, and upon simplifying, we get $\frac{(2r−1)}{(r+5)}$, The denominator is zero when r=-5.