Answer
$(2n-1)(3n-4)$
Work Step by Step
Using factoring by grouping, the factored form of the given expression, $
6n^2-3n-8n+4
,$ is
\begin{array}{l}\require{cancel}
(6n^2-3n)-(8n-4)
\\\\=
3n(2n-1)-4(2n-1)
\\\\=
(2n-1)(3n-4)
.\end{array}