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

10.06.2025 03:24

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

(n - 1)(n + 1)

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n^2 - 1

Why did my bipolar girlfriend split up with me?

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

How many women have accidentally pooped their pants and became turned on afterwards?

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

Why do liberals and Democrats think it’s “ironic” for Donald Trump to say “We have to get back to law and order”?

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Move the nub up to the top:

How can we understand the mind of a Trump supporter?

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 - n + n - 1

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

Patch Notes: New Co-op Emotes! — Warcraft Rumble - Blizzard News

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