Texas Instruments -84 Plus, Manual Book

Page: 69 / 696

Chapter 2: Math, Angle, and Test Operations 66
left
N
rt
indicates that the equation has been evaluated at the new value of the
variable for which you solved.
Editing an Equation Stored to eqn Editing an Equation Stored to eqn Editing an Equation Stored to eqn Editing an Equation Stored to eqn
To edit or replace an equation stored to
eqn
when the interactive equation solver is
displayed, press
}
until the equation editor is displayed. Then edit the equation.
Equations with Multiple Roots Equations with Multiple Roots Equations with Multiple Roots Equations with Multiple Roots
Some equations have more than one solution. You can enter a new initial guess or new
bounds to look for additional solutions.
Further Solutions Further Solutions Further Solutions Further Solutions
After you solve for a variable, you can continue to explore solutions from the interactive
solver editor. Edit the values of one or more variables. When you edit any variable value,
the solid squares next to the previous solution and
left
N
rt= diff
disappear. Move the cursor
to the variable for which you now want to solve and press
ƒ \
.
Controlling the Solution for Solver or solve( Controlling the Solution for Solver or solve( Controlling the Solution for Solver or solve( Controlling the Solution for Solver or solve(
The TI-84 Plus solves equations through an iterative process. To control that process,
enter bounds that are relatively close to the solution and enter an initial guess within
those bounds. This will help to find a solution more quickly. Also, it will define which
solution you want for equations with multiple solutions.