Factor a Trinomial by substitution step by step

The video tutorial explains how to factor a quadratic trinomial using substitution. It begins by identifying the structure of a trinomial and the importance of rewriting it as a product. The instructor introduces the substitution method, where a new variable is used to simplify the expression, making it easier to factor. The process is demonstrated step-by-step, showing how to replace variables and solve the equation. The tutorial concludes with a final factorization and a preview of the next video, which will cover factoring without substitution.

How can you rewrite the expression when using substitution?

What is the final factor form after using substitution in the example provided?