Why is (n-1)(n+1)=n^2-1?

16.06.2025 00:13

Why is (n-1)(n+1)=n^2-1?

xxxx

xx

xxxx

Are today’s baseball pitchers faster than a few years ago, or is it that radar guns have improved and get the pitch speed as it is released rather than as it reaches the plate?

So, that’s a rectangle with sides 2 and 4.

The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2

xxx

My boyfriend has a major problem/addiction with watching porn, nude/sex scenes on movies and shows, watching hot young girls on tiktok, Instagram, Twitter, and onlyfans. He hides it and lies about it. Should I be concerned with him cheating? What do?

(n - 1)(n + 1)

The basic answer is that you cross-multiply the values in each factor:

xxx x

What makes females believe or think abortions are part of a woman’s rights?

Move the nub up to the top:

n^2 - 1

xxx

Can you tell me something about yourself?

xxx x

n^2 - n + 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

After a series of tumors, woman’s odd-looking tongue explains everything - Ars Technica

And you are left with almost a square. One less than the square of side n.