Pre-Calculus-Simplifying a rational expression with an imaginary root as the denominator

The video tutorial explains how to simplify expressions involving negative numbers under square roots by using imaginary numbers. It covers rewriting negative square roots, simplifying the square root of 18, and handling imaginary numbers in denominators. The tutorial concludes with final simplification steps and emphasizes the importance of these techniques in solving mathematical problems.

What is the first step in simplifying the expression mentioned in the text?

How can a negative number under a square root be rewritten according to the text?

What does the expression sqrt(-1) represent, and how is it related to the variable 'i'?

Explain the process of simplifying sqrt(18) as described in the text.

What is the significance of multiplying by 'i' on both the top and bottom of the expression?