Respuesta :

By difference of two squares:

(x - y)(x +y) = x²- y²

(x¹⁰ + y¹⁰)(x¹⁰ - y¹⁰)= (x¹⁰)² - (y¹⁰)² = x⁽² ˣ¹⁰⁾   -   y⁽² ˣ¹⁰⁾  = x²⁰  - y²⁰ 

(x¹⁰ + y¹⁰)(x¹⁰ - y¹⁰) = x²⁰  - y²⁰ 

Hope this helps.