计算:(a2+ab+b2)(a2-ab+b2).
问题描述:
计算:(a2+ab+b2)(a2-ab+b2).
答
(a2+ab+b2)(a2-ab+b2),
=(a2+b2+ab)(a2+b2-ab),
=(a2+b2)2-(ab)2,
=a4+b4+2a2b2-a2b2,
=a4+b4+a2b2.