Answer
$4n^2+27n+18$
Work Step by Step
Using the Distributive Property and then combining similar terms, the given expression, $
(4n+3)(n+6)
,$ is equivalent to
\begin{array}{l}\require{cancel}
4n(n)+4n(6)+3(n)+3(6)
\\\\=
4n^2+24n+3n+18
\\\\=
4n^2+27n+18
.\end{array}