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

14.06.2025 14:34

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

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

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Why do some people prefer watching movies than reading novels even if they are both based on the same source material (book)?

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

Move the nub up to the top:

Japan’s oldest “human” fossils aren’t human at all, says new study - Glass Almanac

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

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If you believe in God, do you think God can save you from cancer?

n^2 - n + n - 1

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

n^2 - 1

How far back into your childhood can your remember and what is your favorite memory of that time?

(n - 1)(n + 1)

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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Is GATE tougher than JEE?

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