Logo

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

Last Updated: 18.06.2025 00:14

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

xxx

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

xxx x

Is a monthly salary of 47,000 SEK before tax considered adequate for a C# .Net developer with over 7 years of experience in Sweden?

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

xxx

xxxx

Why did the American's mulberry harbor not hold up after D-Day?

xx

xxx x

xxxx

Nicholas Galitzine Says Masters of the Universe Has Wrapped Production - Variety

n^2 - n + n - 1

n^2 - 1

Move the nub up to the top:

Were knights’ lances practical weapons, or were they just for sports?

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

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)

When gallery photos are deleted at the same time, why are Google photos also deleted?

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