(x-y)(x+y)(x²+y²)(x的四次方+y的四次方)

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(x-y)(x+y)(x²+y²)(x的四次方+y的四次方)(x-y)(x+y)(x²+y²)(x的四次方+y的四次方)(x-y)(x+y)(x²+y

(x-y)(x+y)(x²+y²)(x的四次方+y的四次方)
(x-y)(x+y)(x²+y²)(x的四次方+y的四次方)

(x-y)(x+y)(x²+y²)(x的四次方+y的四次方)
=(x²-y²)(x²+y²)(x的四次方+y的四次方)
=(x的4次方-y的4次方)(x的4次方+y的4次方)
=x的8次方-y的8次方
连续使用平方差公式即可