## Algebra: A Combined Approach (4th Edition)

Thus, the GCF of terms $40x^7y^2z$ and $64x^9y$ is $8x^7y$.
The GCF of coefficients 40 and 64 is 8. The GCF of $x^7$ and $x^9$ is $x^7$. The GCF of $y^2$ and $y$ is $y$. The GCF of $z$ and 1 is 1. Thus, the GCF of terms $40x^7y^2z$ and $64x^9y$ is $8x^7y$.