(a8-b8)÷(a4+b4)÷(a2+b2)
问题描述:
(a8-b8)÷(a4+b4)÷(a2+b2)
答
(a8-b8)÷(a4+b4)÷(a2+b2)
=(a-b)(a+b)(a2+b2)(a4+b4)÷(a4+b4)÷(a2+b2)
=(a-b)(a+b)