User's Manual

Solve app 259

Solve app

The Solve app enables you to define up to ten equations or

expressions each with as many variables as you like. You can

solve a single equation or expression for one of its variables,

based on a seed value. You can also solve a system of equations

(linear or non-linear), again using seed values.

Note the differences between an equation and an expression:

• An equation contains an equals sign. Its solution is a value

for the unknown variable that makes both sides of the

equation have the same value.

• An expression does not contain an equals sign. Its solution is

a root, a value for the unknown variable that makes the

expression have a value of zero.

For brevity, the term equation in this chapter will cover both

equations and expressions.

Solve works only with real numbers.

Getting started with the Solve app

The Solve app uses the customary app views: Symbolic, Plot and

Numeric described in chapter 5, though the Numeric view is

significantly different from the other apps as it is dedicated to

numerical solving rather than to displaying a table of values.

For a description of the menu buttons common to the other apps

that are also available in this app, see:

• “Symbolic view: Summary of menu buttons” on page 86

• “Plot view: Summary of menu buttons” on page 96