## Elementary Algebra

{$-\frac{3}{4},6$}
Using the rules of factoring trinomials and setting the factors equal to zero, we obtain: $4y^{2}-21y-18=0$ $4y^{2}+3y-24y-18=0$ $y(4y+3)-6(4y+3)=0$ $(4y+3)(y-6)=0$ $(4y+3)=0$ and $(y-6)=0$ $y=-\frac{3}{4}$ and $y=6$ Therefore, the solution set is {$-\frac{3}{4},6$}.