Why is (n-1)(n+1)=n^2-1?
Last Updated: 21.06.2025 00:05
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
(n - 1)(n + 1)
n^2 - 1
xxx
The basic answer is that you cross-multiply the values in each factor:
Has your wife made you a cuckold?
xxx
n^2 - n + n - 1
So, that’s a rectangle with sides 2 and 4.
xxxx
xxx x
Move the nub up to the top:
Stolen iPhones disabled by Apple's anti-theft tech after Los Angeles looting - TechSpot
And you are left with almost a square. One less than the square of side n.
xxx x
xx
Do you regret being married to your current wife?
xxxx