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

12.06.2025 18:23

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

xx

n^2 - 1

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

Is it true that people who are possessed by demons cannot see them until the demon is cast out? What is the reason for this?

xxxx

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 x

Circle IPO soars, giving hope to more startups waiting to go public - TechCrunch

xxxx

xxx x

xxx

Are landlords allowed to make unreasonable requests?

(n - 1)(n + 1)

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

xxx

Why do people have trouble accepting the very true fact that "The Blue Marble" photo of Earth is a composite and therefore (just like every other subsequent "picture" of Earth NASA has ever shown us) not a real photo but computer generated?

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

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

n^2 - n + n - 1

Screen time and physical activity habits linked to adolescent stress and depression - PsyPost

Move the nub up to the top: