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.

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