When a polynomial has 4, 6, 8... terms, we can factor by grouping. To factor
1) Arrange the terms so that the 1st 2 have common factors and the last 2 have
2) Factor out the GCF for each pair of terms
3) Factor out the common binomial
(If the binomial is not common , rearrange the terms & try again)
For any polynomial, if there are no common factors other
than 1, the GCF is 1.