Simplifying a radical expression by multiplying by conjugate

The video tutorial covers the concept of rational zeros in polynomial equations, emphasizing the relationship between positive and negative zeros. It explains the process of eliminating negative square roots by using conjugates, highlighting common misconceptions. The tutorial also demonstrates the application of the difference of two squares and the distributive property to simplify expressions, concluding with the final simplified form of the expression.

What new insight or understanding did you gain from this video?