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

Last Updated: 22.06.2025 21:44

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

xxx

xxx x

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

Tourist shatters fragile crystal-covered ‘Van Gogh’ chair while posing for photo: 'Terrible and shameful' | Trending - Hindustan Times - Hindustan Times

xxx

xxxx

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

The world of the Harry Potter series is usually considered bad worldbuilding. What are some examples of actually good worldbuilding in the books/movies?

n^2 - 1

xxxx

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

Exploding battery fears spark recall of 1.1 million portable chargers - San Francisco Chronicle

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

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

(n - 1)(n + 1)

Single psilocybin trip delivers two years of depression relief for cancer patients - ScienceDaily

xx

n^2 - n + n - 1

xxx x

What are effective strategies to build a referral network for BPO projects?

Move the nub up to the top: