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

14.06.2025 00:47

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

n^2 - 1

n^2 - n + n - 1

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I told my 13-year-old daughter that she should never start a fight, but has my permission to end it. She got suspended for ending a fight that some other girl picked with her by hitting her then retreating. How do I handle the school’s response?

Move the nub up to the top:

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.

What was your first impression of The Carter V by Lil Wayne? Did it feel like 2008 Wayne, when you heard the first few songs.

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How did you know you weren't the narc?

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

(n - 1)(n + 1)

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What is your review of Kota Factory Season 3 (TVF Original)?

If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2

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

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Has Great Britain ever been considered a "hyper-power" like the United States or Russia are currently considered? If not, why?

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