Chapter 9 - Inequalities and Problem Solving - 9.2 Intersections, Unions, and Compound Inequalities - 9.2 Exercise Set - Page 592: 118

$$[5,9]$$

The value under the square root can never be negative. From the first expression, it follows that $x$ must be greater than or equal to 5. From the second expression, it follows that $x$ must be less than or equal to 9. Thus, $x$ must be between 5 and 9. This means: $$[5,9]$$