计算:(3x+2y)2-(3x-2y)2,
问题描述:
计算:(3x+2y)2-(3x-2y)2,
答
(3x+2y)2-(3x-2y)2,
=(3x+2y+3x-2y)(3x+2y-3x+2y)
=6x(4y)
=24xy