Why is (n-1)(n+1)=n^2-1?
Last Updated: 20.06.2025 02:55
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
The basic answer is that you cross-multiply the values in each factor:
Powerful solar flare erupts from sun triggering radio blackouts across North America (video) - Space
So, that’s a rectangle with sides 2 and 4.
n^2 - n + n - 1
Move the nub up to the top:
Do you enjoy cheating on your spouse? If so, why?
xxx
And you are left with almost a square. One less than the square of side n.
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 craziest thing that you've ever witnessed?
xxxx
n^2 - 1
xxx x
What is the most heartbreaking thing your child has told you?
xxxx
(n - 1)(n + 1)
xx
Is there an MBTI personality that is more or less likely to handle stress?
xxx x