## College Algebra 7th Edition

The domain is $\left\{x| x \ge -3\right\}$.
The square root is defined only when the radicand (number/expression inside the radical sign) is non-negative. To find the values of $x$ for which the given expression is defined, solve the inequality $x+3 \ge 0$ to obtain: $x+3 \ge 0 \\x+3-3 \ge 0-3 \\x \ge -3$ Thus, the domain of the given expression is the set of all real numbers greater than or equal to $-3$.