Identify the factoring pattern: y 2 −16=(y+4)(y−4) y2-16=(y+4)(y-4) difference of squares perfect square trinomial difference of cubes sum of cubes

This is a difference of squares. Every time you have the difference between two squares, you can factor it as the product between the sum and the difference of the roots:

In your case, the squares are

So, the difference between the squares, can be written as the multiplication between the sum and difference of the roots:

b, i believe, but not sure.