Question

Is the value of `n^2 - n + 41` prime or composite if `n = 3`?

Answer 1

`47` is a prime number `->` the expression is prime at `n=3`

Explanation:

Expression `=n^2-n+41`

At `n=3` Expression `= 3^2-3+41`

`= 9-3+41 =47`

Since `47` is a prime number, the expression is prime at `n=3`