Answer
$x=-1$ or $x=9$
Work Step by Step
Factor the trinomial to obtain
$(x+1)(x-9)=0$
Use the Zero Product Property by equating each factor to zero, then solve each equation to obtain:
\begin{align*}
x+1&=0 &\text{or}& &x-9=0\\
x&=-1 &\text{or}& &x=9
\end{align*}
