Why is (n-1)(n+1)=n^2-1?
14.06.2025 00:19

xxx
n^2 - n + n - 1
xxx
The basic answer is that you cross-multiply the values in each factor:
And you are left with almost a square. One less than the square of side n.
xx
Why do I sweat so much after applying moisture or sun screen on my face? I have normal skin.
n^2 - 1
Move the nub up to the top:
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
What type of sex do women prefer, oral, anal, or vaginal?
xxxx
xxxx
xxx x
What sexual experience did you have at a highway rest area?
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
So, that’s a rectangle with sides 2 and 4.
xxx x
When you visit a store, do you go to shop or buy?
(n - 1)(n + 1)