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

15.06.2025 07:48

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

(n - 1)(n + 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

What happens in Sweden if you cannot pay a hospital debt you did not know about until recently but willing to pay when your finances improve?

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

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What does it mean when someone says "I'm feeling frisky"?

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

n^2 - 1

Can you share 100 facts about yourself?

n^2 - n + n - 1

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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

Can I have a comfortable life as a nurse in Sweden? Can I buy a house and not worry about the cost of living?

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Move the nub up to the top:

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Can I study a master’s in travel and tourism in Sweden within a budget of 5 lakhs INR?

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