Learn how to use u substitution to integrate a polynomial

The video tutorial explains the process of finding U and DU for integration, addressing a problem with the initial setup, and solving it by dividing by 4. It then demonstrates the integration process, including handling constants, and concludes with the final steps to reach the solution.

How does the teacher justify dividing by 4 on both sides?

What is the final expression obtained after integrating and substituting U back?