Question

(12y+18)(1.6-0.2y)=0

Answer 1

$19.2y-2.4y^2-3.6y+28.8=0;\ D=b^2-4ac= 15,62-4*(-2,4)*28,8=243,36+276,48=519,84;\ x_1= frac{-15.6+22.8}{2*(-2.4)} =-1.5;\ x_2= frac{-15.6-22.8}{2*(-2.4)} =8$