1, factorization refers to the process and result of expressing a polynomial as the product of several polynomials, number domain? p？ Every time in the world? n≥ 1？ The polynomial of can be uniquely decomposed into? p？ Product of irreducible polynomials over? p？ The process of representing an upper polynomial as such a product Factorization of formula normal is actually the inverse operation of algebraic expression multiplication formula.

2. Specific formula:

Square difference formula: a2-b2=(a+b)(a-b)

Complete square formula: A2 2AB+B2 = (A B) 2.

Cubic summation formula: a3+b3=(a+b)(a2-ab+b2)

Cubic difference formula: a3-b3=(a-b)(a2+ab+b2)

Complete cubic formula: A332B+3B2B3 = (AB) 3.

Other formulas: a3+B3+C3-3abc = (a+b+c) (a2+B2+C2-ab-BC-ca)

For example: a2? +4ab+4b2？ =(a+2b)2