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

16.06.2025 01:36

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

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Move the nub up to the top:

(n - 1)(n + 1)

How can I fall asleep fast at night?

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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

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

Why do British people always write "xxx" after their names?

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n^2 - n + n - 1

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Why is it that women are stronger than men nowadays?

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

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

n^2 - 1

Which one is better to guys, boobs or butt?

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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Would you respect the US with a woman as president?

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