多项式3a3b3-3a2b2-9a2b各项的公因式是_.

问题描述:

多项式3a3b3-3a2b2-9a2b各项的公因式是______.

∵3a3b3-3a2b2-9a2b=3a2b(ab2-b-3),
∴公因式为:3a2b.
故答案为:3a2b.