作业帮是说明[4/1m³+2n][4/1m³-2n]+(2n-4)(4+2n)的值与n无关.
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/11 12:33:18
![是说明[4/1m³+2n][4/1m³-2n]+(2n-4)(4+2n)的值与n无关.](/uploads/image/z/7106021-53-1.jpg?t=%E6%98%AF%E8%AF%B4%E6%98%8E%5B4%2F1m%26%23179%3B%2B2n%5D%5B4%2F1m%26%23179%3B-2n%5D%2B%282n-4%29%284%2B2n%29%E7%9A%84%E5%80%BC%E4%B8%8En%E6%97%A0%E5%85%B3.)
是说明[4/1m³+2n][4/1m³-2n]+(2n-4)(4+2n)的值与n无关.
是说明[4/1m³+2n][4/1m³-2n]+(2n-4)(4+2n)的值与n无关.
是说明[4/1m³+2n][4/1m³-2n]+(2n-4)(4+2n)的值与n无关.
利用平方差公式展开得：
原式=﹙¼m³﹚²－﹙2n﹚²＋﹙2n﹚²－16
=﹙½m³﹚²－16
显然原式的值与n无关