Logo

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

12.06.2025 01:42

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

xxxx

n^2 - n + n - 1

xx

Raw Milk Is Trending — Here's Why Doctors Are Seriously Concerned - BuzzFeed

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

Move the nub up to the top:

xxx x

Tooth fossil analysis upends current theory of prehistoric human evolution - Earth.com

If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2

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

(n - 1)(n + 1)

Hillary thinks we must censor or "we lose total control". Why does she demand total control?

n^2 - 1

xxx

xxx

Usher Serves as Groomsman at Robin Thicke and April Love Geary’s Mexico Wedding — See the Photos! - AOL.com

xxx x

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

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

How to watch Apple’s WWDC keynote with iOS 26 and more - 9to5Mac

xxxx