Answer:
4(2z + 3)
Explanation:
Add the numbers
6z + 3 + 2z + 9
6z + 12 + 2z
Combine like terms
6z + 12 + 2z
8z + 12
Common factor
(Factor by grouping)
6z + 3+ 2z + 9
8z + 12
(Factor by grouping)
8z + 12
4(2z + 3)
6z + 3 + 2z + 9
final answer
4(2z + 3)
HOPE THIS HELPS GOOD LUCK!