問題詳情
3.若(a-b) 2＝2,(a+b) 2＝7,則2a 2+2b 2+5的值＝＿＿(3)＿＿。
參考答案
答案：C
難度：簡單0.778037
統計：A(44),B(46),C(666),D(11),E(0)
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