(-2ab)(3a2-2ab-b2)-数学

题目简介

(-2ab)(3a2-2ab-b2)-数学

题目详情

(-2ab)(3a2-2ab-b2
题型:解答题难度:中档来源:不详

答案

(-2ab)(3a2-2ab-b2)
=(-2ab)•(3a2)+(-2ab)•(-2ab)+(-2ab)•(-b2)
=-6a3b+4a2b2+2ab3.

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