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

12.06.2025 04:13

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

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

How could NASA possibly land on the moon when it's impossible to reach the moon through the Earth's dome? Why are they making up such an obvious lie?

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

n^2 - n + n - 1

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Can you share any "backstage pass" experiences you have had at concerts?

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(n - 1)(n + 1)

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

Why are European countries warning European travelers to be careful traveling to the United States?

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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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Is the water safe to drink in England like here in America or is it necessary to bring tablets to prevent any cholera when in London?

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

n^2 - 1

Which is the first MV you watched in Stray Kids?

Move the nub up to the top: