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

11.06.2025 06:33

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

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(n - 1)(n + 1)

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PS5 has a huge price advantage over Xbox and Switch 2 right now - Eurogamer

Move the nub up to the top:

n^2 - 1

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During the Atlmark incident in 1940, the Brit war criminals violated Norwegian neutrality. Hitler could then justify invading Norway. Have the Brits ever apologized for violating Norwegian neutrality?

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

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Amazon planning $10B investment in North Carolina for data center and AI campus - AP News

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

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Your chatbot friend might be messing with your mind - The Washington Post

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

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

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This Genetic ‘Trick’ Helped the Black Death Linger for Centuries - Gizmodo

n^2 - n + n - 1