Please explain the product rule of radicals, root

The video tutorial covers the basics of square roots, focusing on positive values. It explains how to simplify radicals and introduces the product rule of radicals, which allows breaking down the root of a product into individual roots. The tutorial also warns against common mistakes when dealing with addition in radicals, emphasizing that the product rule does not apply to addition or subtraction.

How can you simplify the square root of 18, and what is the result?

What are the key differences between multiplication and addition when dealing with square roots?