What are forms of radical?

Answer 1

The radical symbol, otherwise known as the "square root sign", lets you take the nth root of any number.

Any number can be placed above, and slightly to the left, of the square root sign, to indicate the nth root. For example, the cube root of 27 is 3.

The number inside the square root sign (that which you are finding the square root of), is called the radicand.