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

15.06.2025 01:38

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

Move the nub up to the top:

n^2 - n + n - 1

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

Do Marines really not need sleep during combat training or in general? If this is true, how and why is this possible?

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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What is love?

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

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Why do nice guys rarely or never win?

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

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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

Which bands became massively popular for covering songs rather than recording originals?

n^2 - 1

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What are 5 ways that can be done by the community to improve the public transport system?

(n - 1)(n + 1)