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

Last Updated: 16.06.2025 06:49

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

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n^2 - 1

How is the legalization of same-sex marriage impacting societal norms in the USA?

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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

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

How do you feel about the impending end of what Donald Trump calls "the Green New scam"?

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

How should one handle a situation where they suspect their partner of cheating, but their partner denies it and claims it is all in their head?

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

n^2 - n + n - 1

Why do gun owners feel the need to defend themselves with deadly weapons? Can they not just talk things out like civilized people do?

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Move the nub up to the top:

(n - 1)(n + 1)

What great song was "ruined" once you really listened to the lyrics?

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