Answer
$(8x-5y)(8x+5y)$
Work Step by Step
RECALL:
A difference of two squares can be factored using the formula:
$a^2-b^2=(a-b)(a+b)$
The given binomial can be written as:
$=(8x)^2-(5y)^2$
This binomial is a difference of two squares.
Factor the given difference of two squares using the formula above with $a=8x$ and $b=5y$ to obtain:
$=(8x-5y)(8x+5y)$