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9. 下列哪一個一元二次方程式沒有解?(A) 2x2+3x-4=0 (B) 3x2-4x+3=0(C) x2+x-1=0 (D) x2+3x+1=0。
問題詳情
9. 下列哪一個一元二次方程式沒有解?
(A) 2x2+3x-4=0
(B) 3x2-4x+3=0
(C) x2+x-1=0
(D) x2+3x+1=0。
參考答案
答案:B
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