1product of roots =b=-5
therefore the term in [.] becomes [a2-5a-1]
now sum of roots is -4
therefore -[a2-5a-1]=-4
or [a2-5a-1]=4
therefore a2-5a-1 must lie in [4,5)
Now take both the cases once when it is equal to 4 and when it is equal to 5..
equating it with 4 roots are -0.85 and 5.85
equating it with 5 roots are -1 and 6..
so the solution set is (-1,-.85]U[5.85,6)..
Since there is no integral value in this range...so answer is 0.
