2×【9+2(根号5-2)】+三次根号8-4根号5等于?

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2×【9+2(根号5-2)】+三次根号8-4根号5等于?2×【9+2(根号5-2)】+三次根号8-4根号5等于?2×【9+2(根号5-2)】+三次根号8-4根号5等于?2×【9+2(根号5-2)】+三

2×【9+2(根号5-2)】+三次根号8-4根号5等于?
2×【9+2(根号5-2)】+三次根号8-4根号5等于?

2×【9+2(根号5-2)】+三次根号8-4根号5等于?
2×【9+2(根号5-2)】+三次根号8-4根号5
=18+4根号5-8+6根号2-4根号6
=10+6根号2