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3.試求:452-2x45x55+552=?(A)10000 (B)-100 (C)100 (D)25
問題詳情
3.試求:452-2x45x55+552=?
(A)10000
(B)-100
(C)100
(D)25
參考答案
答案:C
難度:
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(45-55)2=(-10)2=100
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