Question: are ab and ba like terms?
Answer: The like terms are abc and acb; ab and ba. Note, abc and acb are identical and ab and ba are also identical. It does not matter in what order we multiply – for example, 3 x 2 x 4 is the same as 3 x 4 x 2. (c) –3a; –3ab; –3b There are no like terms in this example.