Describe the three errors.

Answer:

The student made three primary errors in their work: 1. They failed to switch both instances of x with y when finding the inverse, which is a necessary first step. 2. When taking the square root, they only included the principal (positive) square root rather than using the ± sign to represent both roots. 3. The domain provided was incorrect; the restriction on x should ensure the radicand is greater than or equal to zero.