HP Prime Graphing Calculator - Manual (Page 373)

Functions and commands 369
Linear Solver app functions
The Linear Solver app has 3 functions that offer the user
flexibility in solving 2x2 or 3x3 linear systems of equations.
Solve2x2 Solves a 2x2 linear system of equations.
Solve2x2(a, b, c, d, e, f)
Solves the linear system represented by:
ax+by=c
dx+ey=f
Solve3x3 Solves a 3x3 linear system of equations.
Solve3x3(a, b, c, d, e, f, g, h, i, j, k, l)
Solves the linear system represented by:
ax+by+cz=d
ex+fy+gz=h
ix+jy+kz=l
LinSolve Solve linear system. Solves the 2x2 or 3x3 linear system
represented by matrix.
LinSolve(matrix)
Example:
LinSolve([[A, B, C], [D, E,F]]) solves the linear system:
ax+by=c
dx+ey=f
Triangle Solver app functions
The Triangle Solver app has a group of functions which allow
solving a complete triangle from the input of three consecutive
parts of the triangle. The names of these commands use A to
signify an angle, and S to signify a side length. To use these
commands, enter three inputs in the specified order given by
the command name. These commands all return a list of the
three unknown values (lengths of sides and/or measures of
angles).