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

Last Updated: 20.06.2025 05:05

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

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

xxx x

Move the nub up to the top:

What are the differences between Republicans and Democrats in their views of the government's role in society? How do these differences impact policymaking?

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

xx

xxx x

How do so-called Religious/Christian people really think homosexuality is even a sin? That would be nonsense. In fact, LGBT people need love instead of contempt/hatred. The word Homosexual didn't appear until the 1850s.

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

n^2 - n + n - 1

NASA warns: massive anomaly spreads across Earth, linked to mysterious forces beneath the surface - Glass Almanac

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

xxxx

xxxx

Has anyone ever read The Holy Bible completely through? If so, what was your overall impression of it?

xxx

n^2 - 1

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

Why do men date women they are not really interested in?

(n - 1)(n + 1)