
Basic algebra question. Why are two of these terms negative instead of minus a positive?
Ok I’m going to try to explain this as clearly as possible. I am re-learning math using Professor Leonard’s yt videos. In this video he is introducing like terms. He says the terms go with the sign in front of them. So that would mean the 3xy and 9 are negative, right?
But he also says like terms are separated by the pluses and minuses. So wouldn’t that mean all four terms are positive because they are separated from the arithmetic signs? I know I’m not making munch sense here.
And why are 3xy and 9 negative instead of minusing two positive numbers?