What are the formula of factorization? How to calculate the result quickly? This is the concept of the first semester of the second grade of junior high school. Please answer if you know!

What are the formula of factorization? How to calculate the result quickly? This is the concept of the first semester of the second grade of junior high school. Please answer if you know!

Extraction of common factors, cross multiplication, and formula method, that is, complete square formula, cubic difference, cubic sum and so on