Salina and Nessa combined like terms using the same expression. Salina’s answer differs from Nessa’s. The table shows both of their solutions. Student's Work Salina Nessa 6 x squared y minus 3 plus x squared y plus 2 x y squared plus 2 x y minus 6 is equal to 7 x squared y minus 9 plus x squared y plus 2 x y squared plus 2 x y 6 x squared y minus 3 plus x squared y plus 2 x y squared plus 2 x y minus 6 is equal to 7 x squared y minus 9 plus 2 x y squared plus 2 x y Which statement is correct regarding their solutions?