问题
解答题
计算: (1)(-12a2b2c)•(-
(2)(3a2b-4ab2-5ab-1)•(-2ab2)=______. |
答案
(1)(-12a2b2c)•(-
abc2)2,1 4
=(-12a2b2c)•
a2b2c4,1 16
=-
a4b4c5;3 4
故答案为:-
a4b4c5;3 4
(2)(3a2b-4ab2-5ab-1)•(-2ab2),
=3a2b•(-2ab2)-4ab2•(-2ab2)-5ab•(-2ab2)-1•(-2ab2),
=-6a3b3+8a2b4+10a2b3+2ab2.
故答案为:-6a3b3+8a2b4+10a2b3+2ab2.