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

Last Updated: 02.07.2025 00:20

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

Move the nub up to the top:

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

xxx x

What are the logical reasons against requiring an ID to vote in the USA? If the government offered to provide IDs for this purpose I fail to see why people are against it.

(n - 1)(n + 1)

xxx x

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

Bitcoin update: From 80 bytes to 4MB – How BTC’s brain can get bigger - AMBCrypto

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

Is there a type of function where every point has exactly one tangent line passing through it? If yes, what is this type of function called?

xxxx

n^2 - n + n - 1

xxx

Australia vs South Africa: Proteas win World Test Championship final at Lord's - BBC

n^2 - 1

xx

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

963 RSP Revealed: Meet Porsche's Street-Legal Le Mans Hypercar - Motor1.com

xxxx