(a²-4b²)(a²+2ab+4b²)(a²-2ab+4b²)＝﹙a＋2b﹚﹙a－2b﹚(a²+2ab+4b²)(a²-2ab+4b²)
＝﹙a－2b﹚(a²+2ab+4b²)﹙a＋2b﹚(a²-2ab+4b²)
＝﹙a³－8b³﹚﹙a³＋8b³﹚
＝a^6－64b^6.
给我最佳,祝你进步!