Why is (n-1)(n+1)=n^2-1?
12.06.2025 00:06

And you are left with almost a square. One less than the square of side n.
xxxx
xx
Switch 2 quietly makes shiny hunting in Pokémon Scarlet and Violet way better - Polygon
The basic answer is that you cross-multiply the values in each factor:
n^2 - 1
n^2 - n + n - 1
So, that’s a rectangle with sides 2 and 4.
(n - 1)(n + 1)
xxxx
Why do so many autistic adults deal with self-hatred?
xxx
xxx x
xxx
Doesn't Musk hire Security for his Tesla dealerships?
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
xxx x
Move the nub up to the top: