A quick way to factor trinomials with a leading coefficient greater than 1. Why don't they teach this in textbooks? This method is “best” because it is more efficient than traditional techniques and because it works with all trinomials so no distinguishing cases are needed. It is also best because the resulting factored form is more useful. For instance, once a quadratic equation is put into its “new” factored form, the answers can be found by inspection. #Mathematics
