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

Last Updated: 19.06.2025 17:09

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

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Do you know a good lawyer joke?

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

(n - 1)(n + 1)

Why are Democrats at Q so desperate that they keep taking down my links to comments that prove the residents in Ohio have been filing complaints about the Haitians eating the local wildlife from ponds in the local parks? Election interference

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

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

n^2 - 1

Who are some of the best Korean Actresses?

Move the nub up to the top:

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What is the STAR interview method?

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 is our generation so unhappy?

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