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

Last Updated: 19.06.2025 01:13

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

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Move the nub up to the top:

n^2 - n + n - 1

I dreamt my mother had died and I cried so much in my dream. What does it mean?

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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n^2 - 1

Why do men prefer women below the age of 30?

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

Why does my dog keep licking at her privates now? She is 7 years old and has barely started licking there. The vet said she’s fine but she keeps doing that.

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

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Can you explain the meaning of "mint condition" in relation to antiques or collectibles?

(n - 1)(n + 1)

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

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Do you even realise that NASA could've hid or bury every single piece of evidence for a flat-earth and exaggerate their evidence? Have you ever question materialist scientific narratives?

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