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

11.06.2025 09:58

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

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How do Flat Earthers explain time zones?

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

n^2 - 1

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Ryan Mountcastle To Miss 8-12 Weeks - MLB Trade Rumors

n^2 - n + n - 1

(n - 1)(n + 1)

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

The International Boxing Association said that Khelif and Lin competing in Paris Olympics were disqualified from the tournament for testing positive for XY chromosomes which give an unfair advantage in the women’s division. What do you think?

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

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Rick Pitino 'Feels Bad' For Tom Thibodeau After Knicks Firing - Sports Illustrated

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

Washington governor activates National Guard in search for accused killer, Travis Decker - KATU

Move the nub up to the top: