Two sufficient conditions under which the roots of the determinant of a given (

) matrix polynomial of

th order lie in the open left-half plane have been obtained. The first condition is given in terms of the positive definiteness of an (

) symmetric matrix, while the second condition is given in terms of the positive definiteness of an (

) matrix that is a function of

, Re

. These conditions are represented in terms of rational functions of the coefficient matrices of the given matrix polynomial. Therefore, the explicit computation of the determinant polynomial is not required.