Answer
$n^2-10n+24$
Work Step by Step
Using the Distributive Property and then combining similar terms, the given expression, $
(n-4)(n-6)
,$ is equivalent to
\begin{array}{l}\require{cancel}
n(n)+n(-6)-4(n)-4(-6)
\\\\=
n^2-6n-4n+24
\\\\=
n^2-10n+24
.\end{array}