I am looking for some help with this grade 11 Math question. (The question isn't incomplete I just need a detailed description).

7. Explain the role of the discriminant in finding the number of roots of a quadratic.Important When answering questions in a mathematics course, always use the following guidelines to help you do your best: . Provide full solutions, showing all of your steps. . Make sure that there is one step or idea per line. . Use one equal sign per line. . Make sure that equal signs line up vertically. . Don't use self-developed short form notations