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

10.06.2025 03:24

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

Move the nub up to the top:

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

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

What does it mean if I had a dream about my mom who passed 12 years ago waking up from her coma and asking for my dad? I have never had a dreams about her since she has been gone.

(n - 1)(n + 1)

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

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n^2 - 1

Single photon detected in multiple locations simultaneously, fueling the multiverse debate - Earth.com

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

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How Cocaine Hijacks the Brain - Neuroscience News

The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2

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n^2 - n + n - 1

What are some common historical misconceptions?

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