利用判別式判斷下列各方程式解的情形。(填入代號) (改編自數習 4-2)(A)－2x2－x＋1＝0 (B) x2＋x＋1＝0 (C) 4x2＋20x＋25＝0 (D) x2＋x

問題詳情

3. 利用判別式判斷下列各方程式解的情形。(填入代號) (改編自數習 4-2)
(A)－2x2－x＋1＝0
(B) x2＋x＋1＝0
(C) 4x2＋20x＋25＝0
(D) x2＋x－1＝0
(E) x2＋x＋6＝0 (F) 3x2＋6x＋3＝0
(1)有相異兩根：____________ 。

參考答案

答案：C
難度：非常簡單0.943935
統計：A(481),B(30),C(9260),D(39),E(0)

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