look here
en.wikipedia.org/wiki/Formula_for_primes
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(n - 4)(n - 12)
If you mean: n2+20n+100 then yes it is because (n+10)(n+10) when factored
169
t(n) = n2
The product of n multiplied by itself is written as n^2, which is read as "n squared." This is because when you multiply a number by itself, you are essentially squaring that number. So, n times n is equal to n^2.