First, distribute the terms inside the parentheses:3a(a) - 3a(4) - 3a(a) - 3(-2)(a) - 3(-2)(2)
Next, combine like terms:3a^2 - 12a - 3a^2 + 6a + 12
Now, combine like terms again:(3a^2 - 3a^2) + (-12a + 6a) - 120 - 6a - 12-6a - 12
So, the final answer is -6a - 12.
First, distribute the terms inside the parentheses:
3a(a) - 3a(4) - 3a(a) - 3(-2)(a) - 3(-2)(2)
Next, combine like terms:
3a^2 - 12a - 3a^2 + 6a + 12
Now, combine like terms again:
(3a^2 - 3a^2) + (-12a + 6a) - 12
0 - 6a - 12
-6a - 12
So, the final answer is -6a - 12.