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

Last Updated: 18.06.2025 01:55

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

xxxx

xxx

n^2 - n + n - 1

How does a single-payer healthcare system handle costs for surgeries, and what's the patient experience like compared to private insurance?

xxx x

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

xxxx

Trump always acts like he was forced to be president, that he was chosen by God. Why do we put up with this? This maniac can't focus and get his mind off of being asskissed like an emperor.

xx

Move the nub up to the top:

xxx

Why are we explaining today’s “climate change” as driven by human related “green house” gasses when natural “global warming” pushed sea level up to the “shores” of Topeka with no human contribution or even presence? Is Occam’s Rasor applied?

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

xxx x

(n - 1)(n + 1)

If you believe in God, do you think God can save you from cancer?

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^2 - 1

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

What made you recently say to yourself, “Wait. Really?”

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