Respuesta :
It is essential that you use the symbol " ^ " to denote exponention. See the following changes I have made.
9u^2v and which term or terms are like terms? 15u^2v. Why? because both have "u^2" in them.
9u^2v and which term or terms are like terms? 15u^2v. Why? because both have "u^2" in them.