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

11.06.2025 05:29

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

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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Patriots OTAs takeaways: Drake Maye rises, Stefon Diggs returns, rookie WR shines - Boston Herald

Move the nub up to the top:

n^2 - 1

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Why do Democrats never produce a good argument for why Trump was a bad president?

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(n - 1)(n + 1)

Patriots OC Josh McDaniels Discusses Offense's Progress and Other Takeaways From Monday's Practice - New England Patriots

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

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.

I've never read the book. What did Dorian Grey do that was so immoral and sinful?

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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

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Why do Democrats call any Republican "Magats", like they are subhuman?

n^2 - n + n - 1