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

Last Updated: 16.06.2025 13:58

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

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Move the nub up to the top:

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 is better, 4 more years of Trump with the media trying to hurt him, or 8 years of DeSantis with the media licking booty, or 4 to 8 years of RFK with the media hating on him all the time? (Biden is not an option, he can't win)

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n^2 - 1

(n - 1)(n + 1)

Why do people keep complaining about how some people copy and paste the question before answering it? To me, it's very disturbing and makes me want to block and mute them as annoying whiners.

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

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

Why is our generation so unhappy?

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Have you made a female relative or friend squirt?

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

Why do some men like older women?

n^2 - n + n - 1