(a-1/2b) (a+1/3b)-(a-1/3b) (a+1/2b) 整式的乘法

问题描述:

(a-1/2b) (a+1/3b)-(a-1/3b) (a+1/2b) 整式的乘法

(a-1/2b) (a+1/3b)-(a-1/3b) (a+1/2b)
=(a²-1/2ab+1/3ab-1/6ab)-(a²-1/3ab+1/2ab-1/6ab)
=(-1/2+1/3+1/3-1/2)ab
=-1/3ab