Question

Which expression is equivalent to 9a + 12?
3 ( 3a +2)
3 (6a + 9)
3 (3a +4)
3 (6a + 3)

Answer 1

$9a+12=3 \times 3a+3 \times 4=3(3a+4)$

The answer is 3(3a+4).

Answer 2

The answer is 3 ( 3a + 4 )

Because when you do the distributive property you have this:

3 ( 3a + 4 )

9a + 12.