## Algebra 1

$\frac{2r-1}{r+5}$, denominator is 0 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.