x2－8x＋15可因式分解為(x＋ a) (x＋b )，其中a ＞b ，則 a－b ＝？(A)2 (B) －2 (C) 0 (D) 6

問題詳情

1. x2－8x＋15可因式分解為(x＋ a) (x＋b )，其中a ＞b ，則 a－b ＝？
(A)2
(B) －2
(C) 0
(D) 6

參考答案

答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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