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

12.06.2025 06:09

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

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n^2 - 1

Can you fly an American flag in the UK in your own private property there? What is the UK’s government stance on that? And if yes, do you also have to fly the UK flag or the American flag can fly solo?

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Move the nub up to the top:

Do you think covid 19 was never as bad as it got made out to be where we needed lockdowns and restrictions?

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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

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Meteor Activity Outlook for June 7-13, 2025 - American Meteor Society

n^2 - n + n - 1

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

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

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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(n - 1)(n + 1)