Respuesta :

2(3a+6) because 2x3a=6a 2x6 is 12
6a + 12....factor out the 6
6(a + 2) ...not an answer choice
OR 
6a + 12....factor out 3
3(2a + 4) ...not an answer choice
OR
6a + 12....factor out 2
2(3a + 6) <==== this one