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

13.06.2025 09:21

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

n^2 - 1

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

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What should you do if a police officer comes to your house and asks for someone who doesn't live there anymore?

(n - 1)(n + 1)

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What is price of the "liberal celebrities" e.g. Bill Maher, Seth Meyers, Jon Stewart, Trevor Noah, Jimmy Kimmel, Desi Lydic etc. to join the great MAGA movement like Stephen Colbert who wanted to European ambassadorship to turn back on "the Left"?

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

Since the Brits can't steer their oil tanker, what makes them think they can take on Russia?

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

Move the nub up to the top:

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What are some examples of unofficial acts by presidents?

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

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

Why do flat earthers delete their answers after being proven wrong? Are they just being ignorant and arrogant?

n^2 - n + n - 1