The quadratic factor is positive everywhere.
You could try putting it into standard form, or you can just check its discriminant to see if this is negative or not. You should find that the discriminant,,...... , so this means the quadratic factor as a function will not have points on the x-axis....
That then leaves you with the critical x value for the linear factor, and that is at x=5.
;
Check the signs in the indicated intervals to see which interval makes the inequality true and which make it false.
INTERVAL ANALYZE INEQUALITY RESULT
(-infin,5) (-)(+)>0, FALSE FALSE
(5,infinity) (+)(+)>0, TRUE TRUE