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

10.06.2025 05:52

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

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What was your first gay male experience?

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

(n - 1)(n + 1)

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

Why do flat Earthers still exist even though it is scientifically proven that the Earth is spherical?

Move the nub up to the top:

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What are some ten strong legal evidences that are needed for a divorce?

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

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

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

So I’m getting piano lessons and my teacher wants me to get an upright piano instead of a keyboard. An upright piano is way above my price range, so what do I do? And what’s the difference between an upright piano and a keyboard?

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n^2 - 1

n^2 - n + n - 1

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