Question

3X3=4+5,5X5=12+13,7X7=24+25的规律

电脑关机时，拔掉U盘，电脑文件会丢失吗？

Answer 1

(2n+1)²=(2n²+2n)+(2n²+2n+1) ,这是公式。

Answer 2

(2n+1)²=(2n²+2n)+(2n²+2n+1)

Answer 3

(2n+1)(2n+1)=(2n^2+2n)+(2n^2+2n+1)