Please help this is really hard for me

Write the converse of the following statement: if the trees have no leaves, then it is fall. if the trees have no leaves, then it is fall. the trees have no leaves, therefore it is fall. it is fall since the trees have no leaves. if it is fall, then the trees have no leaves.

How do you do the foil method with polynomials?

How do you write 600 as a product of its prime factors (index! )