#### Answer

$\color{blue}{(5z^2-2x)(4+p)}$

#### Work Step by Step

Regroup by grouping the first two terms together and the last two terms together to obtain:
$=(20z^2-8x)+(5pz^2-2px)$
Factor out $4$ in the first and $p$ in the second group to obtain:
$=4(5z^2-2x)+p(5z^2-2x)$
Factor out $5z^2-2x$ to obtain:
$=\color{blue}{(5z^2-2x)(4+p)}$