Answer
$3a^4-2a^2-a.$
Work Step by Step
We divide each term of the polynomial by the monomial as follows
$$
\frac{24a^4 - 16a^2 - 8a}{8}
= \frac{24a^4 }{8}+ \frac{ - 16a^2 }{8}+ \frac{ - 8a}{8}\\
=3a^4-2a^2-a.
$$
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