Why is (n-1)(n+1)=n^2-1?
Last Updated: 17.06.2025 05:47
xxx
The basic answer is that you cross-multiply the values in each factor:
n^2 - n + n - 1
Have you ever regretted not hitting on a older women?
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
Move the nub up to the top:
xx
n^2 - 1
(n - 1)(n + 1)
Why can’t the British eat or drink anything unless they place a table cloth on the table first?
So, that’s a rectangle with sides 2 and 4.
And you are left with almost a square. One less than the square of side n.
xxxx
What is the nastiest thing you had your wife do and she loved it?
xxx
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
xxxx
xxx x