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

Last Updated: 19.06.2025 09:33

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

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

xxxx

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

Why aren't there any Indian girls married to Chinese guys but Chinese girls married to Indian guys?

xxx

Move the nub up to the top:

If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2

What is the significance of Pete Rose, the all-time hits leader in Major League Baseball, who just passed away?

(n - 1)(n + 1)

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

xxx x

What were the first few days, weeks, months and then years like after finding out about your spouses infidelity? How did your feelings, and yours & their approach to the situation change in the immediate aftermath compared to later down the line?

n^2 - 1

xx

n^2 - n + n - 1

What exactly is female squirting? Is it only urine or a combination of liquids?

xxx

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

xxx x

Why do people keep denying the similarities between Latin and Italian by saying they are totally different languages when it’s obvious they sound similar?

xxxx