你好
(a²-b²)²-8(a²+b²)
=(a+b)²(a-b)²-8[(a+b)²-2ab]
=4(a-b)²-8[4-2ab]
=4(a-b)²+16ab-32
=4[(a-b)²+4ab]-32
=4(a+b)²-32
=16-32
=-16