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

15.06.2025 00:17

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

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

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

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What CIA front organizations operated in the United States during the 1960s?

(n - 1)(n + 1)

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What should a young woman do to control sagging breasts?

n^2 - n + n - 1

n^2 - 1

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

Why do some people hesitate to say 'I love you' even after their partners have said it first? How can one interpret this behavior from their loved ones?

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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

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 gang stalkers want?

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Move the nub up to the top:

Why do many people think that Japan is not a gay-friendly country whereas 72% Japanese support same-sex marriage (the same number as in the US)?

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