Sqrt[z] or Sqrt[z] gives the square root of z.

$MaxRootDegree specifies the maximum degree of polynomial to allow in Root objects.

Two decades of intense R&D at Wolfram Research have given Mathematica by far the world's broadest and deepest coverage of special functions—and greatly expanded the whole ...

RootOfUnityQ[a] yields True if a is a root of unity, and yields False otherwise.

FindRoot[f, {x, x_0}] searches for a numerical root of f, starting from the point x = x_0.FindRoot[lhs == rhs, {x, x_0}] searches for a numerical solution to the equation lhs ...

RootMeanSquare[list] gives the root mean square of values in list.

RootReduce[expr] attempts to reduce expr to a single Root object.

With careful attention to branch cuts, Mathematica supports trigonometric functions everywhere in the complex plane, with extensive exact and algebraic transformations, ...

RootIntervals[{poly_1, poly_2, ...}] gives a list of isolating intervals for the real roots of any of the poly_i, together with a list of which polynomials actually have each ...

Using original algorithms developed at Wolfram Research, Mathematica has full coverage of all standard Bessel-related functions—evaluating every function to arbitrary ...