expand the following number (3a+2)3
(3a+2)^3
= (3a+2)(9a^2 + 12a + 4)
= 27a^3 + 36a^2 + 12a + 18a^2 + 24a + 8
= 27a^3 + 54a^2 + 36a + 8
or , using the binomial expansion
= 1(3a)^3 + 3(3a)^2 (2) + 3(3a)(2^2) = 1(2^3)
= 27a^3 + 54a^2 + 36a + 8