Online Algebra Calculator
Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only. To do this job, it is not useful to download the whole application from a web site.
Function: sqrt (<x>) The square root of <x>. It is represented internally by <x>^(1/2). See also rootscontract.

radexpand if true will cause nth roots of factors of a product which are powers of n to be pulled outside of the radical, e.g. sqrt(16*x^2) will become 4*x only if radexpand is true.
There are also some inexact matches for sqrt. Try ?? sqrt to see them.
(%o1) true (%i2)