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In the first case SOLVEVX could not find a solution. In the second case,
SOLVEVX found a single solution, X = 2.
The following screens show the RPN stack for solving the two examples shown
above (before and after application of SOLVEVX):
The equation used as argument for function SOLVEVX must be reducible to a
rational expression. For example, the following equation will not processed by
SOLVEVX:
Function ZEROS
The function ZEROS finds the solutions of a polynomial equation, without
showing their multiplicity. The function requires having as input the expression
for the equation and the name of the variable to solve for. Examples in ALG
mode are shown next:
To use function ZEROS in RPN mode, enter first the polynomial expression, then
the variable to solve for, and then function ZEROS. The following screen shots
show the RPN stack before and after the application of ZEROS to the two
examples above: