计算:(a2+ab+b2)(a2-ab+b2).

问题描述:

计算:(a2+ab+b2)(a2-ab+b2).

(a2+ab+b2)(a2-ab+b2),
=(a2+b2+ab)(a2+b2-ab),
=(a2+b22-(ab)2
=a4+b4+2a2b2-a2b2
=a4+b4+a2b2