## College Algebra (6th Edition)

16$a^{2}$$x - 25y - 25x + 16a^2$$y$ = 16$a^{2}$$x - 25x + 16a^{2}$$y$ - 25$y$ = $x$(16$a^{2}$ - 25) + $y$(16$a^{2}$ - 25) = ($x$ + $y$)(16$a^{2}$ - 25) = ($x$ + $y$)(4$a$ + 5)(4$a$ - 5)