Answer:
Step-by-step explanation:
alright so first you want to multiply 3x by 3x and y
so far you have 9x^2+3xy
then you do y x 3x and y x y
now you have 9x^2+3xy+3xy+y^2
then you combine like terms to get the final answer of
9x62 + 6x^2y^2 + y^2
