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

Last Updated: 18.06.2025 02:25

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

(n - 1)(n + 1)

n^2 - 1

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

How do you respond to "I don't like you anymore"?

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

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 do you cope when your mother doesn't love you?

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Move the nub up to the top:

What do you think will be the biggest factor in determining whether Daniel Penny was justified in believing that Jordan Neely had posed a deadly threat in the manslaughter trial?

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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Have you ever had a scary dream about a loved one or friend soon after their death?

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

n^2 - n + n - 1

Why am I sweating so much at night even though my room is really cold?

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