math problem
posted by Lavern .
subtract the polynomials
please help having trouble
(12a^2+3a+3)(6a^2+3)

 12 a ^ 2 + 3 a + 3  ( 6 a ^ 2 + 3 ) =
 12 a ^ 2 + 3 a + 3  6 a ^ 2  3 =
 12 a ^ 2  6 a ^ 2 + 3 a + 3  3 =
 18 a ^ 2 + 3 a =
3 a (  6 a + 1 ) =
3 a ( 1  6 a ) =
3 a ( 6 a  1 )