## Introductory Algebra for College Students (7th Edition)

Polynomials that cannot be factored using integer coefficients are called prime polynomials over the set of integers. Examples of prime polynomials $x,$ $x+1,$ $3x+2,$ $3x^{2}+2$ Examples of polynomials that are not prime: $3x+9$, because it can be factored to $3(x+3),$ $x^{2}-3x,$ because it can be factored to $x(x-3),$ $x^{2}+6x+8,$ because it can be factored to $(x+4)(x+2),$