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

Last Updated: 26.06.2025 12:28

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

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Why are there no fossils for the 'missing link' that connects our ancestors with other species? Is this a misconception or is there another explanation?

n^2 - 1

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.

Asperiores culpa provident similique ab.

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

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(n - 1)(n + 1)

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Move the nub up to the top:

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n^2 - n + n - 1

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

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

Culpa nobis molestiae ab dignissimos omnis nesciunt.

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