问题
计算题
(﹣2ab)(3a2﹣2ab﹣b2)
答案
解:(﹣2ab)(3a2﹣2ab﹣b2)
=(﹣2ab)(3a2)+(﹣2ab)(﹣2ab)+(﹣2ab)(﹣b2)
=﹣6a3b+4a2b2+2ab3.
(﹣2ab)(3a2﹣2ab﹣b2)
解:(﹣2ab)(3a2﹣2ab﹣b2)
=(﹣2ab)(3a2)+(﹣2ab)(﹣2ab)+(﹣2ab)(﹣b2)
=﹣6a3b+4a2b2+2ab3.