Answer
$5xz^3$
Work Step by Step
\begin{align*}
\text{The $GCF$ of $
10,
20,
\text{ and }
45
\text{ is }
5
$}
.\\\\
\text{The $GCF$ of $
x^3,
x^2,
\text{ and }
x
\text{ is }
x
$}
.\\\\
\text{The $GCF$ of $
z^3,
z^5,
\text{ and }
z^3
\text{ is }
z^3
$}
.\end{align*}
Hence, the $GCF$ of the given expressions is $5xz^3$.
