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

14.06.2025 07:18

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

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

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

What did your sister do to you that you can never forget?

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

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Isn't it unfortunate for the Democrats that we Republicans are the masters of the universe who control everything while the Democrats control nothing?

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Move the nub up to the top:

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Even Captain James T. Kirk was trapped in a woman's body. Don't you think he'd support trans people?

(n - 1)(n + 1)

n^2 - 1

n^2 - n + n - 1

Can bosses get fired for being too hard on employees?

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

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How Long Of A Ride Is Mario Kart World? - Kotaku

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