
14 Solve app
The Solve app enables you to dene 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 following dierences between an equation and an expression:
●
An equation contains an equal 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 equal 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 view; however, the Numeric view is
signicantly dierent from the other apps as it is dedicated to numerical solving rather than to displaying a
table of values.
The Symbolic view and Plot view menu buttons are available in this app.
One equation
Suppose you want to nd the acceleration needed to increase the speed of a car from 16.67 m/s (60 kph) to
27.78 m/s (100 kph) over a distance of 100 m.
The following is the equation to solve is:
V
2
= U
2
+ 2AD
In this equation, V = nal speed, U = initial speed, A = acceleration needed, and D = distance.
Getting started with the Solve app 293
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