Answer :
The given polynomial is,
[tex]\begin{gathered} n^2-10n-25=n^2-2\times5\times n+5^2-5^2-25 \\ =(n-5)^2-50 \end{gathered}[/tex]Thus, the given polynomial is no a perfect square.
Thus, Option (a) is correct.
The given polynomial is,
[tex]\begin{gathered} n^2-10n-25=n^2-2\times5\times n+5^2-5^2-25 \\ =(n-5)^2-50 \end{gathered}[/tex]Thus, the given polynomial is no a perfect square.
Thus, Option (a) is correct.