Question

Define factorization.

Answer 1

In mathematics, factorization (also factorization in some forms of British English) or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original.
And expressions (like $x^2+4x+3$) have factors as (x+1) and (x+3)