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

Last Updated: 20.06.2025 00:12

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

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:

Can you tell me a depressing story?

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Move the nub up to the top:

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How do you explain BYD selling more battery electric vehicles than Tesla in Europe for the first time in April?

n^2 - n + 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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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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How do police officers feel about the fear they instill into criminals?

(n - 1)(n + 1)

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

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What advice would you give to a father of a teenage daughter on how to protect her from boys, dating, and social media? How should fathers discuss these topics with their daughters?

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