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

Last Updated: 19.06.2025 02:00

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

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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

n^2 - 1

Why are right-wing commentators spreading conspiracy theories about Haitians eating local pets in Springfield, Ohio?

n^2 - n + n - 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

Move the nub up to the top:

Why do people say "tall, dark, and handsome" when they actually mean "tall, white, and handsome"?

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What happens if a parent refuses to let their child be transgender? What happens if the parent tries their hardest not to allow their child to be trans, like flushing every bottle of their trans child's HRT down the toilet?

(n - 1)(n + 1)

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

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Astronomers discover ultrapowerful black hole jet as bright as 10 trillion suns lit by Big Bang's afterglow - Space

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

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In your opinion, who is the most overrated singer/band/artist in modern music history and why?

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