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

13.06.2025 02:07

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

(n - 1)(n + 1)

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Move the nub up to the top:

Why are liberals so bad at grasping alternative facts? For example, if something doesn’t happen the exact same way Trump described it, liberals dismiss it as false; while conservatives are able to fully understand the underlying principle.

n^2 - 1

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

What baseball stories from the early days of the sport seem too bizarre to be true?

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

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

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Why am I so tired of seeing homeless people all over the place?

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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How often do prisoners try to escape from jail/prison, and how many of them succeed?

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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Everyone says the pet population is out of control. Everyone says you MUST spay or neuter your pets. No one wants to talk about how its almost $1,000 to spay or neuter a pet. Why is it so expensive if its so necessary? Animal shelters do it for free.

n^2 - n + n - 1