Root::nup

Details

This message is generated when the indicated expression involves more than one variable.
The Root function is only intended for use with univariate polynomials.
Off[message] switches off the message; On[message] switches it on. For example: Off[Root::nup].

The expression c+x+x^5 is treated as a polynomial in the two variables c and x:

A pure function may be used to indicate a univariate polynomial with symbolic coefficients:

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