This math topic focuses on determining the function domain involving fractions with square roots, where the numerator is a linear equation and the denominator contains quadratic expressions with complex roots. The problems require mapping these domains accurately onto a number line. Each question presents a different function expression and asks to identify the correct domain representation among multiple choices. This practice is part of a broader unit dealing with functions' domain and range solving skills, enhancing understanding of how function inputs are constrained by mathematical expressions.