题目内容
(-8a4b5c÷4ab5)(-3a3b2).
6a6b2c.
提示:先确定结果符号.(-8a4b5c÷4ab5)(-3a3b2)=-2a3c(-3a3b2)=6a6b2c.
①[(a+B)2]4=(a+B)6 ②(a+x2)(-ax2+By3)=B2y6-a2x4 ③(3a6x3-9ax5)÷3ax3=a5-3x2 ④(-8a4B5c÷4aB5)·(-3a3B2)=-6a6B2c
A.1个 B.2个 C.3个 D.4个