Integration Substitution u substitution Example 3 1

Welcome to Calculus Made Easier! In this video, we explore one of the most powerful tools in the integration toolbox: substitution, often called u-substitution. If you’ve ever looked at a messy integral and thought, “This looks impossible,” you’re in the right place. Substitution is a way to change the perspective—to trade in something complicated for something simpler. We’ll walk through: • Why substitution works (and when to use it) • How to choose your u • Step-by-step examples with real intuition • A few subtle gotchas—and how to avoid them