HP Prime Graphing Wireless Calculator - Manual (Page 144)

140 Functions and commands
Solve app functions
The Solve app has a single function that solves a given
equation or expression for one of its variables. En may be an
equation or expression, or it may be the name of one of the
Solve Symbolic variables E0–E9.
SOLVE Solve. Solves an equation for one of its variables. Solves the
equation En for the variable var, using the value of guess as
the initial value for the value of the variable var. If En is an
expression, then the value of the variable var that makes the
expression equal to zero is returned.
SOLVE(En,var,guess)
Example:
SOLVE(X 2 -X-2,X,3)returns 2
This function also returns an integer that is indicative of the
type of solution found, as follows:
0—an exact solution was found
1—an approximate solution was found
2—an extremum was found that is as close to a solution
as possible
3—neither a solution, an approximation, nor an
extremum was found
Spreadsheet app functions
The spreadsheet app functions can be selected from the App
Toolbox menu: press
D , tap and select
Spreadsheet. They can also be selected from the View
menu ( V ) when the Spreadsheet app is open.