Math tutorial for subtracting two radical expressions by obtaining same radicands

The video tutorial explains the process of simplifying radicals before performing addition or subtraction. It emphasizes the need for radicans to be identical for these operations. The instructor demonstrates two methods: using factor trees and identifying square numbers that divide into the radican. An example is provided to illustrate the simplification process, followed by combining the simplified radicals by subtracting their coefficients. The tutorial concludes with the final answer, highlighting the importance of maintaining the radical expression while performing arithmetic operations.

How do you rewrite a square root in terms of its square number?

What is the final result when subtracting the coefficients of the simplified radicals in the example given?