In this video the instructor shows how to factor a trinomial with negative leading coefficient. Most of the students are confused when they have to factor a trinomial with a negative leading coefficient. But there are many ways to solve these kind of problems as shown in this video. One way you can do is that take out the greatest common factor (GCF) of -1 from the equation. So pulling the -1 gives you the original trinomial with all the signs of the terms changed. Now go on and factor the new trinomial by the normal procedure. Multiply the numerical coefficient of first term and last term. Split the previous product to obtain the middle term and finally factorize the whole equation. Now tag the previous -1 that was pulled out to the obtained factors giving the answer to the original trinomial. This video shows how to factor a trinomial with a leading negative coefficient.