To find the product of (3 - 2a) and (4 + a), we can use the distributive property of multiplication over addition.
We multiply each term in the first expression (3 - 2a) by each term in the second expression (4 + a):
(3 - 2a) * (4 + a) = 3 * 4 + 3 * a - 2a * 4 - 2a * a.
Simplifying each term, we have:
12 + 3a - 8a - 2a^2.
Combining like terms, we get:
12 - 5a - 2a^2.
Therefore, the product of (3 - 2a) and (4 + a) is 12 - 5a - 2a^2.