This math topic focuses on finding the domain of functions that involve a fractional integer over the square root of a quadratic expression, specifically when the quadratic has complex roots. Students are required to identify the valid input values (domain) for functions presented in these forms, ensuring the expressions under the square root remain non-negative to avoid imaginary results. This skill is critical for understanding how to handle functions and expressions involving square roots and complex numbers within the broader context of functions' domain and range.