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

Last Updated: 20.06.2025 03:00

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

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Why is it after eating almonds when I’m occupied, I don’t feel mild itch, but as soon as I have nothing to do, I feel mildly itchy?

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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 - 1)(n + 1)

Humans have evolved and become hairless and odor free. How do other races learn about evolution since evolution does not apply to them?

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

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Does believing in God and Satan cause schizophrenia?

n^2 - 1

Move the nub up to the top:

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

The Democrats’ candidate, Kamala, is a total loser, while our candidate, Trump, is a legendary hero and a living god. Are you ready to lose BIG Democrats?

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

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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The Louvre, the world’s most-visited museum, shuts down to sound the alarm on mass tourism - PBS

n^2 - n + n - 1