Factoring a quadratic with a negative leading coefficient

How to factor a quadratic with a negative leading coefficient

[omara.]

I came across a question like this. If I were to just use the gcf as -1 and do the rest as normal, is that correct?

[catcorbin]

What if there is nothing that you can multiply by that will add up to the middle term?

[omara.]

Also i use the x method. would that work???