This math topic focuses on the skill of rewriting square roots of negative numbers as complex numbers, particularly using the imaginary unit "i". Problems involve calculating the complex form of given roots and simplifying where possible. Each problem provides practice on recognizing and converting negative radicands into their corresponding imaginary number equivalents, clearly demonstrating an understanding of the basics of complex numbers. The various sub-answers under each question offer multiple examples of this conversion process, which solidifies the concept of expressing square roots of negative numbers in terms of "i".