In the previous sections we have worked with radical expressions and have developed a better understanding of the properties of radicals. Now, we will continue working with radicals to solve equations and inequalities.
When solving a radical inequality, we approach the problem the same way as we would for a radical equation. What is the only difference?
Source: MICDS Integrated Mathematics 2 Notes
You don't NEED to watch this, it is just additional information if you're interested in how these applications can be applied to Physics.