若(x＋3)(x＋m)＝x2－2x－15，則m的值為„„„„„„„„„„„„„„„„„„„（         ...

問題詳情：

若 (x＋3)(x＋m)＝x2－2x－15，則 m 的值為„„„„„„„„„„„„„„„„„„„（                          ）

A．5                                                            B．－5                                                          C．2                                                             D．－2

【回答】

B

知識點：整式的乘法

題型：選擇題