
(x-y)(x+y)(x的二次方+y的二次方)(x的4次方+y的4次方)
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(x-y)(x+y)(x²+y²)(x^4+y^4)
=(x²-y²)(x²+y²)(x^4+y^4)
=(x^4-y^4)(x^4+y^4)
=x^8-y^8
=x的8次方 -y的8次方
=(x²-y²)(x²+y²)(x^4+y^4)
=(x^4-y^4)(x^4+y^4)
=x^8-y^8
=x的8次方 -y的8次方
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