Calculate: (-12y^2-6y-9)/(-3)

Expression: $\frac{ -12{y}^{2}-6y-9 }{ -3 }$

Factor out $-3$ from the expression

$\frac{ -3\left( 4{y}^{2}+2y+3 \right) }{ -3 }$

Cancel out the common factor $-3$

$4{y}^{2}+2y+3$