Why is (n-1)(n+1)=n^2-1?
Last Updated: 21.06.2025 02:20
(n - 1)(n + 1)
Move the nub up to the top:
xxx x
xxxx
xxx
And you are left with almost a square. One less than the square of side n.
How can one learn to talk frankly?
If you cut off the end of that rectangle, you make it smaller, 2 * 3 and a separate nub of size 1 * 2
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
Why do people who were very kind and loving once become cold-hearted?
n^2 - n + n - 1
n^2 - 1
xxx x
xxx
xxxx
xx
Can people who have never met you tell if you are a covert narcissist?
The basic answer is that you cross-multiply the values in each factor: