Why is (n-1)(n+1)=n^2-1?
Last Updated: 20.06.2025 10:43

xxx
n^2 - 1
Move the nub up to the top:
Bank of Japan leaves interest rate unadjusted at 0.5% as expected - FXStreet
xxx x
xxxx
And you are left with almost a square. One less than the square of side n.
Why did Trump call Biden and Schumer Palestinians?
xxxx
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
xxx
n^2 - n + n - 1
xxx x
So, that’s a rectangle with sides 2 and 4.
The more direct answer is to look at a rectangle with sides of n + 1 and n - 1, let’s go with n = 2
(n - 1)(n + 1)
The basic answer is that you cross-multiply the values in each factor:
Have husbands and wives ever had a threesome with someone in real life? How did it happen?
xx