Multiply by the conjugate to simplify a radical rational expression

The video tutorial covers rationalizing denominators by multiplying by the conjugate to eliminate radicals. It explains the difference of two squares, showing how middle terms cancel out, simplifying expressions. The tutorial also applies the distributive property to multiply numerators, emphasizing the importance of these techniques in simplifying mathematical expressions.

What is the process of rationalizing the denominator when dealing with radicals?

Explain the difference of two squares and how it applies to the multiplication of conjugates.

What happens to the middle terms when applying the difference of two squares?

How do you simplify the expression after rationalizing the denominator?

What is the final result when you simplify the expression 4 - sqrt(9)?