What are the 3 steps for factoring completely? 2. how did the technique of “factoring by grouping” get it’s name? 3. how can you tell if factoring by grouping works for a problem? 4. what is a perfect square trinomial? 5. a.) how can you tell if a binomial is the difference of two squares. b.) what is the factored form of the difference of two squares. 6. how do you find the zero’s of a polynomial function?