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

11.06.2025 20:35

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

Move the nub up to the top:

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What makes cars from companies like Dacia or BYD appealing compared to Tesla, especially in Europe?

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

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Why doesn’t the UK change their flag?

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

Why is my crush beautiful to me but not to others?

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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n^2 - 1

What is the experience of wearing a school uniform every day? Do people typically get used to it or dislike it?

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

n^2 - n + n - 1

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

How can you determine which type of underwear to wear with different styles of clothing, such as dresses?

(n - 1)(n + 1)