Appendix A - Review - A.8 Solving Equations - A.8 Assess Your Understanding - Page A70: 2

The solution set is $\left\{-\frac{5}{3}, 3\right\}$.

Use the Zero-Product Property by equating each factor to zero, then solve each equation to obtain: \begin{align*} x-3&=0 &\text{or}& &3x+5=0\\ x&=3 &\text{or}& &3x=-5\\ x&=3 &\text{or}& &x=-\frac{5}{3}\\ \end{align*}