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

Last Updated: 16.06.2025 11:15

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

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

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How do people who are deaf learn sign language? Is it typically taught by parents at a young age or are there programs available for learning it later in life?

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n^2 - 1

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 do women stubbornly refuse to let men lead, even though they are attracted to the man, and the man both loves and desires them? Why do they get angry and blame the man when he gets fed up and walks away, when it's entirely their own fault?

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

Move the nub up to the top:

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Who is the most dangerous or evilest person of all time?

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

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(n - 1)(n + 1)

What are the most meaningful Jewish jokes that reveal insights about Jewish culture?

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

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n^2 - n + n - 1