(3x-2y)2(3x+2y)2(9x2+4y2)2.
问题描述:
(3x-2y)2(3x+2y)2(9x2+4y2)2.
答
原式=[(3x-2y)(3x+2y)]2(9x2+4y2)2
=(9x2-4y2)2(9x2+4y2)2
=[(9x2-4y2)(9x2+4y2)]2
=(81x4-16y4)2.