Last Updated:

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

The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...

Last Updated:

Will Trump's tariffs harm the USA?

Trump’s haphazard tariff policies already hurt the USA. In fact, the trade war confirmed to both U.S...