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

The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...
Last Updated:
The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...
Last Updated:
Season 8, Episode 1: “Winterfell” Tyrion and Varys ride on a cart on the road to Winterfell, surroun...
Last Updated:
Because the daily struggles of life sober seems do-able. Or at least not life threatening so it’s en...
Last Updated:
Cardiologists are getting loud about a sneaky red flag of heart issues.
Last Updated:
People are voting on whether to cut from 10 to five years the time required to apply for citizenship...
Last Updated:
The sharpest images ever captured of the sun reveal intricate magnetic structures dancing across its...
Last Updated:
Like any other professional group, scammers use the jargon of their trade to communicate with each o...
Last Updated:
Researchers from Kaiser Permanente Northern California reveal that adults aged 45 to 49 undergoing t...
Last Updated:
Xabi Alonso gets his first win as manager.
Last Updated:
Which headphones and earbuds do I think you should buy?
Last Updated:
A doctor in New York City has discovered a worrying trend between one drink almost two-thirds of Ame...