问题
选择题
| 下列各式正确的是( ) |
| A.3a2 · 5a3 =15a 6 B.-3x4 · (-2x)2 =(-3)×4x6=-12x 6 C.3x3 · 2x4 =(3×2)x3+4=6x 12 D.(-b)3 · (-b)5 =b 8 |
答案
答案：D
搜题请搜索小程序“爱下问搜题”
| 下列各式正确的是( ) |
| A.3a2 · 5a3 =15a 6 B.-3x4 · (-2x)2 =(-3)×4x6=-12x 6 C.3x3 · 2x4 =(3×2)x3+4=6x 12 D.(-b)3 · (-b)5 =b 8 |
答案：D