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

16.06.2025 02:14

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

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)

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

Epidemiological update: SARS-CoV-2 and NB.1.8.1 variant assessment - European Centre for Disease Prevention and Control

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

—— indirects on kuorans, irl and idols

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

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Libtards argue Obama deported more people than Trump, but if that were true why weren't they comparing Obama to Idi Amin?

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n^2 - n + n - 1

If the Red Pill is supposed to be so bad, why are so many young men buying into it? What about Red Pill makes it appealing to them?

Move the nub up to the top:

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n^2 - 1

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?

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