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

09.06.2025 08:39

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

n^2 - n + n - 1

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

Why does my crush always looks at me in a sad way whenever I talk with other boys, and if he catch me staring on him then he go and flirt with other girls and then check if I am looking at him?

n^2 - 1

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Move the nub up to the top:

How do I identify fake friends in life?

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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

Sometime ago, the Iranian Minister said that a US Navy aircraft carrier would be an easy target for 300 speed boats armed with Katyusha rocket launchers. Is this true?

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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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Which country has the best and strictest legal system in the world?

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(n - 1)(n + 1)

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