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

Last Updated: 21.06.2025 00:07

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

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

n^2 - 1

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

Where can Ukrainians go if they cannot have shelter and heating this winter?

xx

xxx

(n - 1)(n + 1)

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?

xxxx

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

n^2 - n + n - 1

Why is Reagan seen as the best president in the USA when he literally destroyed the American economy with trickle down system and was strongly against worker unions?

xxx x

xxxx

Move the nub up to the top:

Why does my cat get anxious during loud noises like thunderstorms or firework displays? Is this a common behavior for cats, and is there a way to help them cope with it?

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

What are the withdrawal symptoms of Klonopin 1mg?

xxx