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12.若x+3y是9的負平方根, 2x+3y是49的正平方根,則x=___(12)__。
問題詳情
12.若x+3y是9的負平方根, 2x+3y是49的正平方根,則x=___(12)__。
參考答案
答案:C
難度:適中0.686469
統計:A(16),B(39),C(208),D(9),E(0)
用户評論
【用戶】
Nick Lin
【年級】國二上
【評論內容】第 46 條
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