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

13.06.2025 12:26

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

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Move the nub up to the top:

Why would a girl not want you to know she has a crush on you?

(n - 1)(n + 1)

n^2 - 1

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

How might an Indian girl respond to someone saying "I love you"?

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

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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

Why does Boko Haram attack its own Muslims?

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

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

How do Flat Earthers explain time zones?

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n^2 - n + n - 1

How long can someone with narcissistic tendencies maintain a facade of fake love before their true self is revealed? Is there a specific trigger or amount of time that causes them to reveal their true nature?

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