Root of what is used for?

Users questions:What role to play in mathematics?
Experts answer: To answer this question also needs to know how to roots, we know that 2 2 = 4,3 3 = 9 ... ... to have two square is equal to the square is equal to 4,3 9; So what do the square is equal to 16? Which will appear radical, radical roleIs the desire for a certain number of square root.
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