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

14.06.2025 00:40

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

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How is it, in the USA, a country with 334 million people, the choice of President comes down to two aged men, one of whom is a liar as well as a criminal, one who appears to be on his way to dementia. Surely a democratic country can put up better?

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

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

Move the nub up to the top:

(n - 1)(n + 1)

n^2 - 1

If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

n^2 - n + n - 1

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What movies have not aged well?

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

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

Do all therapists specialize in one specific type of therapy, or are they trained in multiple types?

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