问题
解答题
(x+2)(x-2)(x2+4)-(x2-4)2.
答案
(x+2)(x-2)(x2+4)-(x2-4)2,
=(x2-4)(x2+4)-(x4-8x2+16),
=x4-16-x4+8x2-16,
=8x2-32.
(x+2)(x-2)(x2+4)-(x2-4)2.
(x+2)(x-2)(x2+4)-(x2-4)2,
=(x2-4)(x2+4)-(x4-8x2+16),
=x4-16-x4+8x2-16,
=8x2-32.