No.
Radical(1.21) = 1.1, for example, is rational.
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-The radical is the symbol that represents a square root. -The radicand is the number underneath the radical symbol. -The coefficient is the number out in front of the radical. (We assume that the coefficient multiplies the radical, the same way it would multiply with a variable.)
The term radicand means the number or expression inside the radical symbol. For example, when we have the square root of 2, the 2 is inside the radical symbol. It is the radicand. The radicand may be a number or an algebraic expression. Also, there is not limit to the number of terms the radicand may contain. It may even be infinite!
discriminant
The radical symbol ( √ ) followed by a line above what's in the radical, designates positive square root.
It is the RADICAL SIGN , its definition is - the symbol used to indicate a nonnegitive square root.