计算﹙a+b+4﹚﹙a²+2ab+b²-4a-4b+16﹚
问题描述:
计算﹙a+b+4﹚﹙a²+2ab+b²-4a-4b+16﹚
答
=(a+b+4)[(a+b)²-4(a+b)+4²]
=(a+b)³-4³
=a³+3a²b+3ab²+b³-64