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

09.06.2025 04:00

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

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Move the nub up to the top:

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

What can I do when I'm ugly on both outside and inside? What do I do? Cut myself off from the world to make everyones lives better? I'm a monster. I hurt feelings, and I say what was said to me. I feel like I'm nothing but a burden. What do I do?

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

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

(n - 1)(n + 1)

Why are Democrats deflecting and aren’t as tough on Hunter Biden with all of his criminal activity and his rising possibility of him receiving a charge for illegally owing a gun?

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

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

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13 million years ago, this object released as much energy as a billion suns in a fraction of a second! - Farmingdale Observer

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n^2 - 1

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n^2 - n + n - 1

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