They are there unit distance away from each other
For a rectangle, A = LW.
A = (3x + 2)(x - 4)
A = 3x^2 - 12x + 2x - 8
A = 3x^2 -10x - 8
the additive inverse of -8 is 8
to find the additive inverse you just have to change the sign of the number
-1.6 - 0.3
I hope this hepled you and that the answer is correct