#### Answer

none of these

#### Work Step by Step

The given expression, $
-25x^2-9
,$ is not a perfect square trinomial because it has only 2 terms. It is not a difference of squares because the signs of the first and second terms are the same. It is not a prime polynomial because it can be factored by factoring the $-1$. Hence, among the choices, it is $\text{
none of these
.}$