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

13.06.2025 11:56

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

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n^2 - 1

Why do liberals and Democrats think it’s “ironic” for Donald Trump to say “We have to get back to law and order”?

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n^2 - n + n - 1

Will the opposition parties like NTK, AIADMK, BJP, TVK, etc. form a pre-election alliance in Tamil Nadu on a single agenda of defeating the DMK alliance in the state assembly elections 2026?

(n - 1)(n + 1)

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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

Who are your 5 or so favorite Quora people?

Move the nub up to the top:

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

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

Are there any more 'nun' jokes?

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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

How does growing up in chaos affect a child as they become an adult?

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