Question

（x的四次方+y的四次方)(x的二次方+y的二次方）（x+y）（x—y）等于多少呢

Answer 1

(x^4+y^4)(x^2+y^2)(x+y)(x-y)还原

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

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

x^8-y^8