The complete factorization of the given polynomial is:
[tex]x^3-3x^2+x-3=(x^2+1)(x-3)[/tex]
Factorization of a polynomial--
It means that the polynomial could be expressed as the product of distinct factors containing the rational roots of the polynomial.
We are given a polynomial expression as:
[tex]x^3-3x^2+x-3[/tex]
Now, it could be factorized as follows:
[tex]x^3-3x^2+x-3=x^2(x-3)+1(x-3)\\\\i.e.\\\\x^3-3x^2+x-3=(x^2+1)(x-3)[/tex]
Now, we know that the expression:
[tex]x^2+1[/tex] do not have a rational root.
Hence, the complete factorization is:
[tex]x^3-3x^2+x-3=(x^2+1)(x-3)[/tex]