Sum of the Eigen values is product of Diagonal elements.
For given matrix diagonal elements sum = 4-5 = -1
In given options -6 and 5 sum only give -1. so -6 and 5 are Eigen values
sum of diagonal elements sholud be equal to sum of eigen values , so 1st or 2nd choice can be the answer ..... product of eigen value is equal to the determinant of the matrix ..... |A| = - 30 so .... answer is -6 and 5