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

Last Updated: 17.06.2025 05:38

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

n^2 - n + n - 1

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(n - 1)(n + 1)

Why do I want to suck cock, after smoking methamphetamine?

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Move the nub up to the top:

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What are some important works of Marcel Proust (novelist)?

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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.

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

n^2 - 1

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My waist finally looks like how it did before I had kids but I didn’t lose weight. Why am I still 15 lbs from my starting weight?

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

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.

Can you share 100 facts about yourself?

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