Write the first five terms of the sequence an=3n^2

Umm.. just started this 2day and its not on my notes(p′︵‵。)

Apolynomial function has a root of –6 with multiplicity 1, a root of –2 with multiplicity 3, a root of 0 with multiplicity 2, and a root of 4 with multiplicity 3. if the function has a positive leading coefficient and is of odd degree, which statement about the graph is true?

What are “like terms”? why can we only add like terms?