10y^2 -21y+9=0 (2y )(5y ) ( -3)( -3) (2y-3)(5y-3) Solve: (2y-3)=0 2y-3+3=0+3 2y=3 2y/2=3/2 y=3/2 Solve: (5y-3)=0 5y-3+3=0+3 5y=3 5y/5=3/5 y=3/5