$\"\"$

The function is $\"\"$ .

The given function is a radical function.

So the expression under the square root (the radicand) must be nonnegative $\"\"$ . $\"\"$

Solve the inequality $\"\"$ .

$\"\"$

Multiply each side by negative one and flip the symbol.

$\"\"$ .

The domain of $\"\"$ is $\"\"$ . $\"\"$

The domain of $\"\"$ is $\"\"$ .