根号2加2倍根号2等于?

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根号2加2倍根号2等于?
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根号2加2倍根号2等于?
根号2加2倍根号2等于?

根号2加2倍根号2等于?
等于3√2啊

根号2加2倍根号2=3根号2

√2 + 2√2 = 3√2