(x+y)²-16(x-y)²
来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/25 00:04:06
(x+y)²-16(x-y)²(x+y)²-16(x-y)²(x+y)²-16(x-y)²(x+y)²-16(x-y)²
(x+y)²-16(x-y)²
(x+y)²-16(x-y)²
(x+y)²-16(x-y)²
(x+y)²-16(x-y)²=(x+y)²-[4(x-y)]²
=[﹙x+y﹚＋4﹙x-y﹚][﹙x+y﹚-4﹙x-y﹚]
=﹙5x-3y﹚﹙5y-3x﹚
利用平方差公式.