How to determine the endpoint, given one endpoint and midpoint

The video tutorial addresses a common problem where students struggled to find an endpoint given a midpoint and one endpoint. The teacher explains the importance of understanding the problem, demonstrates plotting points, and walks through the midpoint formula. The tutorial concludes with solving for the unknown endpoint using algebraic manipulation.

Explain the steps taken to solve for Y2 in the problem.

What are the final coordinates of the other endpoint determined in the problem?