## Newton's applet

This applet lets you find numerical solutions to equations in one
variable. Type the equation on the first line (e.g.
` x^2 + exp(3 x) = 5 `

, and press **Enter**.
Click on the X after **Solve for** to
change the variable name,
if necessary, to whatever letter you wish to use.
On the third line you can specify an interval in which to look for the
solution. Finally, click on **Go**. **X = ...** (or whatever
letter you are using for the variable) shows the value of the variable
that the
applet found (if it found one). **F = ... ** shows the difference
between left and right sides of your equation for that value of X.
This should be close to 0. Note that numbers are sometimes written
in "scientific notation", e.g. 1.234E-12 means 1.234 x 10^{-12}.
**F' = ... ** shows the derivative of the difference of the two sides
at that value of X.

Mathematical Formulas