# Solver

To enter the Solver application, highlight the app using the directional keys. Press the ok key to enter the application. This application allows you to solve equations and systems of equations with both exact and numerical solutions. You can also solve simple and compound interest problems.

The first screen of the application allows you to choose between Equations (for solving equations) and Finance (for solving financial calculations).

## Equations

### Solve an equation

#### Enter an equation

You can begin entering your equation as soon as you enter the Equations section**. You can also choose to utilize one of the equation templates.

To enter an equation without utilizing a template:

1. Begin entering your equation as soon as you enter the Equations section.
2. You can utilize any lower case letter as a variable. To use $x$ as your unknown value, press the xnt key.
3. To input the equal sign, press shift followed by the pi key. If you confirm without an equal sign in your equation, $=0$ will be added automatically.
4. Press the ok key to confirm.

To use an equation template:

1. Highlight Add equation.
2. Press the ok key. The list of equation templates will appear.
3. Highlight your desired template.
4. Confirm with the ok key. Your equation template will now be located in the editing field.
5. Use the directional keys and numerical keys to adjust the desired equation as needed.
6. Confirm with the ok key.

#### Solutions

To obtain the solution(s) of your equation:

1. Enter the equation(s) you wish to solve.
2. Highlight Solve the equation at the bottom of the screen.
3. Press the ok key to receive the solution(s).

The solution is given in exact and approximate form. For quadratic and cubic equations, the discriminant (∆) is also given.

##### General case

Most often, solutions are computed numerically and their value is often approximated.

When you press the Solve the equation button, the application may require you to set an interval in which to search for the solution.

Set the values of Xmin and Xmax and highlight Solve the equation. Confirm with the ok key.

If there are many solutions, the calculator will only display the first ten.

### Solving a system of equations

#### Entering a system of equations

You can enter more than one equation to be solved as a system. To enter a system of equations:

1. Enter the first equation in your system manually or using a template.
2. Highlight Add equation.
3. Enter the second equation in your system manually or using a template.
4. Continue as needed to complete your system.

You can add up to 6 equations.

#### Solutions

The application solves linear systems with real or complex coefficients.

To obtain the solutions, highlight Solve the system at the bottom of the screen and press the ok key.

The application gives the solutions in exact and decimal form. It also indicates if there are infinitely many solutions or if there is no solution.

## Finance

In the Finance part, you can choose the parameter to be solved in the context of simple or compound interest and then enter the data so that the calculator calculates the value sought.

1. Choose Simple interest or Compound interest
2. Choose the parameter you want to calculate
3. Enter the known values
4. Select Confirm to solve