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

Last Updated: 19.06.2025 05:25

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

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How can I get my ex-husband to love me again?

n^2 - n + 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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The Labour Party wants to put the Winter fuel allowance and the £800,000 of gifts received by ministers behind us. Is this a real option for the people who will suffer as our new masters unapologeticly feast on freebies?

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

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

While wearing high heels and walking heel to toe, when the toe box hit the floor there is a noise. How do I keep the noise just for the heel?

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

(n - 1)(n + 1)

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Move the nub up to the top:

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