Answer
$2y(3x+1)(3x-1)$
Work Step by Step
Factoring the $GCF=
2y
$ results to $
2y(9x^2-1)
$. Using $a^2-b^2=(a+b)(a-b)$ or the factoring of the difference of 2 squares, then,
\begin{array}{l}
2y(9x^2-1)
\\=
2y(3x+1)(3x-1)
.\end{array}