What factoring method should be used to factor a polynomial with four terms?

The easiest way to factor it is to use grouping.

Step-by-step explanation:

you look at only two terms at a time to see if any techniques become apparent.

When a polynomial has four or more terms, the easiest way to factor it is to use grouping. In this method, you look at only two terms at a time to see if any techniques become apparent. For example, you may see a Greatest Common Factor (GCF) in two terms, or you may recognize a trinomial as a perfect square.