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(4+2根号5)²(4-2根号5)+(4+2根号5)(4-2根号5)²
人气:239 ℃ 时间:2020-05-28 07:25:05
解答

(4+2根号5)²(4-2根号5)+(4+2根号5)(4-2根号5)²

=(4+2根号5)(4-2根号5)(4+2根号5+4-2根号5)

=16-20+8

=4

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