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

12.06.2025 00:07

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

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

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(n - 1)(n + 1)

Trivago watched its revenue forecast plummet from $1 billion to nearly zero—so the company tapped a set of former interns to turn it around - Fortune

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

What do flat earthers think about Antarctica?

Move the nub up to the top:

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

Why are Capri cigarettes so expensive?

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

n^2 - n + n - 1

What is Palantir? The secretive tech company behind Trump's data collection efforts - Mashable

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

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Global Investors Suddenly Have a New Concern: A U.S. ‘Revenge Tax’ - WSJ

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