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

16.06.2025 05:22

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

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

Move the nub up to the top:

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Why do all the stupid people think Donald J. Trump is stupid?

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

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.

How can I help my cat adjust to sleeping in its own room after allowing it to sleep with us as a kitten?

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

Why did Amazon initially deny leave of absence to Alexis Scott-Windham, the Amazon worker who survived the New Orleans terrorist attack?

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My stepdaughter’s mom tells her I’m not a real dance teacher, but my stepdaughter has seen me in action. Why does she still question my abilities?

n^2 - n + n - 1

(n - 1)(n + 1)

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Why are liberals so bad at grasping alternative facts? For example, if something doesn’t happen the exact same way Trump described it, liberals dismiss it as false; while conservatives are able to fully understand the underlying principle.

n^2 - 1