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

10.06.2025 00:44

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

(n - 1)(n + 1)

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

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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

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

A Manson Family member was recommended for parole again. But she's not free just yet - NPR

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

If Donald Trump is so evil and Joe Biden is so good why is Trump the one selflessly providing Bibles for the needy while Biden doesn't? Why doesn't Biden care for America's spiritually needy people as much as Trump?

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

n^2 - 1

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n^2 - n + n - 1

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Should parents force their kids to go to school when they are sick?

Move the nub up to the top: