Answer
$(2-3n)(2+3n)$
Work Step by Step
The given expression can be written as:
$=2^2-(3n)^2$
RECALL:
A difference of two squares can be factored using the formula:
$x^2-y^2=(x-y)(x+y)$
Use the formula above with $x=2$ and $y=3n$ to obtain:
$= (2-3n)(2+3n)$