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

08.06.2025 00:03

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

(n - 1)(n + 1)

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

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

Knight, Nurse among unprotected in PWHL expansion - theScore.com

Move the nub up to the top:

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The Labour Party wants to put the Winter fuel allowance and the £800,000 of gifts received by ministers behind us. Is this a real option for the people who will suffer as our new masters unapologeticly feast on freebies?

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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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Why can't the US government force this new deep seek to not operate in the USA for security reasons? People's personal information will be available to China like TikTok was.

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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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What could be the result if I block a covert narc back after he said blocks were going back up, maybe we try this again?

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

n^2 - 1

Do you think some men have sex with prostitutes because they're too afraid to talk to women? Money does the talking for them.

n^2 - n + n - 1