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

Last Updated: 26.06.2025 14:05

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

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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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I took a video of my serve (60 FPS) and it took 0.4 seconds from my racket to the service line. How fast would you say my serve was?

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

(n - 1)(n + 1)

What are the core beliefs of liberalism and conservatism? Can you provide a list of defining characteristics for each side?

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

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How can I be the smartest human on Earth?

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Move the nub up to the top:

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

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n^2 - n + n - 1

n^2 - 1

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How quickly can you gain muscle by only consuming milk and chicken breasts, without using any supplements such as creatine or whey isolate?

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