Question

What is the additive inverse of 18xy?

Answer 1

The answer to this question is A. -18xy. Good luck.

Answer 2

An additive inverse is the value you can add to a given value such that the sum is "0".. 

Your answer is choice A
18xy + (-18xy) = 0   Since these are like terms.. the key here is understanding that like terms must have the same exact variables raised to the exact same powers.  We can add like terms.  We cannot add unlike terms.