Respuesta :

Answer: x^8 - y^8

Step-by-step explanation: x^8 - y^8

using a^2 - b^2 = ( a + b )( a - b )

( x^4 + y^4 )( x^4 - y^4 )

( x ^4 + y^4 )( x^2 + y^2 )( x^2 - y^2 )

( x^4 + y^4 )( x^2 + y^2 )( x + y )( x - y )