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Function SOLVEVX
The function SOLVEVX solves an equation for the default CAS variable
contained in the reserved variable name VX. By default, this variable is set
to ‘X’. Examples, using the ALG mode with VX = ‘X’, are shown below:
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):
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
SG49A.book Page 4 Friday, September 16, 2005 1:31 PM