Put the name X on the stack, indicating the variable for which you're
Calculate the zeros, using QUAD
in the SOLVE menu.
This expression represents both solutions to the quadratic expression.
The variable sl represents an arbitrary sign, either
1 or -1, and
each value of sl corresponds to a zero of the expression.
Store the expression as the current equation.
Display the Solver menu.
sl is the only variable in the current equation.
First make sl a positive sign.
Return one of the solutions to level 1.
9: Symbolic Solutions