解:因式分解x^4-y^4=(x^2+y^2)(x^2-y^2)=(x^2+y^2)(x+y)(x-y)此题如仍有疑问,欢迎追问!祝:学习进步!
(x∧2+y∧2)( x∧2-y∧2 )=( x∧2+y∧2 )(x+y)(x-y)