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

10.06.2025 00:06

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

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Giannis Antetokounmpo to the Raptors? What a trade could look like as reported mutual interest exists - CBS Sports

Move the nub up to the top:

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

What is the best interracial stories that you hear or know and want to share?

n^2 - n + n - 1

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n^2 - 1

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

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

(n - 1)(n + 1)

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James Webb Detects Never-Before-Seen Molecule on Scorching Exoplanet - The Daily Galaxy

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

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

After Drug Allegations, Elon Musk Arrives at His Own Goodbye Party With a Black Eye and a Bizarre Excuse - futurism.com

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