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

Last Updated: 17.06.2025 00:52

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

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

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

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

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(n - 1)(n + 1)

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My grandmother deeded me her house before she passed last year. Her son still lives there refusing to move. What steps should I take to have him removed?

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n^2 - n + n - 1

What is the more common way to say "you're welcome" in French: “De rien” or “Pas de problème”?

n^2 - 1

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

What is the definite integral of x^x from 0 to 2?

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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Why cant I breathe when I sleep on my back, I can breathe if im on my side or stomach but I feel uncomfortable since either my neck is twisted or my back is in pain, im physically healthy and my surroundings are clean so whats the problem?

Move the nub up to the top: