化简:(a-b)(a+b)2-(a+b)(a-b)2+2b(a2+b2)
问题描述:
化简:(a-b)(a+b)2-(a+b)(a-b)2+2b(a2+b2)
答
(a-b)(a+b)2-(a+b)(a-b)2+2b(a2+b2),
=(a-b)(a+b)(a+b-a+b)+2b(a2+b2),
=2b(a2-b2)+2b(a2+b2),
=2b(a2-b2+a2+b2),
=4a2b.