Answer
$12a^2-10a-12$
Work Step by Step
We multiply each term of the first
polynomial by each term of the second polynomial. Then we add the products, as follows
$$
(6a + 4)(2a - 3)= 6a (2a - 3)+ 4(2a - 3)\\
=12a^2-18a+8a-12=12a^2-10a-12
.$$