This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The term "radical" simply refers to "square root". To get the square root of a number, you have to look for the number that when multiplied to itself, gives off that answer. For example, the square root of 25 is 5. When you multiply 5 by itself, it gives off 25. :) Hope I helped.