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

Last Updated: 02.07.2025 14:27

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

xx

xxx

xxx

Do you have any controversial and unpopular K-pop opinions?

xxx x

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

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

Boris Johnson says that “Starmer picked a fraudster for his Cabinet because he is the fraudster-in-chief. And he knows, in his heart, that the whole government is a fraud.” Do you agree with Boris Johnson about Starmer?

n^2 - n + n - 1

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

xxx x

New study uncovers surprising physics of 'marine snow' - Phys.org

(n - 1)(n + 1)

n^2 - 1

xxxx

How Much Sun Do You Really Need to Get Enough Vitamin D? - Verywell Health

xxxx

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.

Box Office: ‘Ballerina’ Arms Itself With $10.6 Million Opening Day, ‘Lilo & Stitch’ Gets Third Weekend on Top - Variety

Move the nub up to the top: