What is the fully factored form of 32a3 + 12a?

O 4a? (8a + 3)

O 4a8a? + 3a)

O 12a? (3a + 1)

O 12a (3a² + a)

4a (8a² + 3)

Step-by-step explanation:

Expression: 32a³ + 12a

1. Variable (a) : the first part has a * a * a, while the second has a, which means that only a can be factored out, leaving us with a (32a² + 12a)

2. Constants (32 and 12) : These two number's GCF is 4, so if that is factored out, we are left with 4a (8a² + 3)

Hopefully there is a typo somewhere as I got an answer similar to A but not exactly.