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

Last Updated: 23.06.2025 02:22

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

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

Which Ayurvedic ritual, dry brushing, oil pulling, or facial massage, do you want to try first?

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

n^2 - 1

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Move the nub up to the top:

n^2 - n + n - 1

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How conservative the Japanese people really is? And the government?

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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

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

Why am I losing interest to get a job and to all my desires because of this spiritual awakening? How do I get through life because of it?

(n - 1)(n + 1)