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

13.06.2025 06:24

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

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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

n^2 - 1

Vernon Reid on Why Sly and the Family Stone Were the Greatest American Band - Rolling Stone

Move the nub up to the top:

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

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

Why are Christians quick to say that there are a lot the gay Christians that exist NOW and use that to pretend that Christianity is just loving to gays when the last 40 years of my life they been horrible?

n^2 - n + n - 1

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What specific economic and social impacts would result if all climate change policies and regulations were immediately repealed worldwide?

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Why did it take seven days for troops with helicopters, equipment, supplies, food, and water to be dispatched to southeast storm zones?

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

(n - 1)(n + 1)

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When gallery photos are deleted at the same time, why are Google photos also deleted?

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