Answer
Not factorable
Work Step by Step
$3t^2-5t-1$
The only pairs of numbers whose product is $3$ (the coefficient of $x^2$) are $1$ and $3$ or $−1$ and $−3$.
The only pair of numbers whose product is $-1$ (the value for $c$) is $1$ and $−1$.
There is no combination of the pairs of numbers to get a value of $−5$, so we are at the factored form of the polynomial.