São termos semelhantes : I= (2ab) (3ab) II= (3x+y) (3x+x) III= (4a+2b-3c) (8a-3b+5c) IV= (9x+2y) (15x-6y) *
a)I,II e III
b)II, III e IV
c)I, II e IV
d) I, III e IV