Question

Xpower4 -y power 4 plus xpower2minus ypower2

Answer 1

Step-by-step explanation:

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

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

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

{(x+y)(x-y)}{(x^2+y^2)+1}

(x^2-y^2)(x^2+y^2+1)