To factor the expression \( 5m - 15 \), we can start by identifying the greatest common factor (GCF) of the terms.
The GCF of \( 5m \) and \( -15 \) is \( 5 \).
Now we can factor out \( 5 \) from the expression:
\[ 5(m - 3) \]
So, the factored form of the expression \( 5m - 15 \) is:
\[ 5(m - 3) \]
Insert the response \( (m - 3) \) in the correct input to complete the answer.