Logo

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

15.06.2025 04:50

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

xxx

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

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

Why does Boko Haram attack its own Muslims?

n^2 - n + n - 1

xx

Move the nub up to the top:

What is it like to be the slave in a mistress-slave relationship?

(n - 1)(n + 1)

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

xxx x

Where can Ukrainians go if they cannot have shelter and heating this winter?

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

xxxx

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

How Amazon’s Nuclear Deal Could Solve a Touchy Political Problem - Barron's

xxx

xxxx

n^2 - 1

How did China invent gunpowder but it was the European nations that went out and “conquered the world using firearms”?

xxx x