Answer:
a^2 - 3
Step-by-step explanation:
(3a^2 + 1) - (4 + 2a^2)
3a^2 + 1 - 4 - 2a^2
a^2 - 3
the answer is -12/3 cause it's negative
-6, because you can see a pattern in which the x coordinate of each pair is reversed to the opposite value, from positive to negative.