## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

$x^3y^3(x^6y^3-x^4y^2+xy+1)$
Factoring the negative $GCF= x^3y^3$, the factored form of the given expression, $x^9y^6-x^7y^5+x^4y^4+x^3y^3 ,$ is \begin{align*} x^3y^3(x^6y^3-x^4y^2+xy+1) .\end{align*}