So what is the question exactly I’m confused on how this is asked
(c+8)(c-8)
3(2y+5)(2y-5)
There are no like terms so it's still ab^2-b
![[n][n+8]=0](https://tex.z-dn.net/?f=%5Bn%5D%5Bn%2B8%5D%3D0)
if either or both of
![[n]](https://tex.z-dn.net/?f=%5Bn%5D)
and
![[n+8]](https://tex.z-dn.net/?f=%5Bn%2B8%5D)
are 0, i.e. if one or both of

and

are even. But both will be even if

is even, and odd otherwise, so any even

will be a solution, e.g.

.