Why is (n-1)(n+1)=n^2-1?
14.06.2025 10:40

So, that’s a rectangle with sides 2 and 4.
xxxx
The basic answer is that you cross-multiply the values in each factor:
Why do girls in Indian top colleges wear shorts?
n^2 - n + n - 1
xxx x
n^2 - 1
xxx
xxxx
xxx x
Do Americans realize how much goodwill and credibility they've lost in the past two weeks?
(n - 1)(n + 1)
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
xxx
How do I convince my husband that a threesome is okay?
And you are left with almost a square. One less than the square of side n.
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
Move the nub up to the top:
It seems that I am cursed with bad luck. How do I break such a curse?
xx