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

问题详情：

若 (x＋3)(x＋m)＝x2－2x－15，则 m 的值为„„„„„„„„„„„„„„„„„„„（                          ）

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

【回答】

B

知识点：整式的乘法

题型：选择题