Logo

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

11.06.2025 14:05

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

Move the nub up to the top:

(n - 1)(n + 1)

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

Trump, DOJ threaten Calif. with legal action, fines after trans athlete’s win - The Washington Post

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

xxx

n^2 - 1

Adam Sandler will cast Derrick Henry in a movie if he rushes for 2,000 yards - NBC Sports

xxx x

xxx x

xxx

Have you ever seen your wife being fucked?

xx

xxxx

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

What are the primary causes of the persistent smog crisis affecting Delhi and other parts of North India?

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

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

n^2 - n + n - 1

JetBlue Talked To American And Delta—But United Made The Offer It Couldn’t Refuse - Live and Let's Fly

xxxx