How to Multiply Two Binomials with Radicals

The video tutorial covers the multiplication of binomials containing radicals. The instructor introduces the concept and suggests using the box method for organization. A detailed example is provided, demonstrating each step of the multiplication process. The tutorial concludes with simplification of the expression and a final answer, emphasizing the importance of organizing work and recognizing when terms can be combined.

Why can't the teacher combine the terms at the end of the problem?

What final expression does the teacher arrive at after performing the calculations?