To apply the distributive property to the expression \(-3(m + 6)\), you multiply \(-3\) by each term inside the parentheses:
\[ -3(m + 6) = -3 \cdot m + -3 \cdot 6 \]
Now, performing the multiplication:
\[ -3m - 18 \]
So, the expression \(-3(m + 6)\) simplifies to:
\[ -3m - 18 \]