How would I solve this problem by difference of squares?

Question

z²-(x-y)²

Answer 1

Hi Zack,

 

The difference of two squares is equal to their sum multiplied by their difference. So, if we have

a^2 - b^2 then it will be equal to

(a+b)(a-b)

We are given z²-(x-y)² 

Can you figure it out using the information above?