Cross product is a good method for factoring polynomials. Please make sure to understand how to use it. Here is one video for the method. Remember before factoring a trinomial you must determine if there is a greatest common factor (GCF) or not. If there is a GCF, factor that out and then start factoring with criss cross.
https://www.youtube.com/watch?v=nz058Hil6rA
https://www.youtube.com/watch?v=nz058Hil6rA