The equation solver is a powerful tool for solving single variable algebraic equations. There a two forms of equations you can enter in the solver. The first is a full equality such as "x^2=x+1". With an initial guess of 0, GraphCalc returns -0.618 for this equation. There are other numbers that work in this equation, and to get them, you need to supply GraphCalc with a guess closer to the answer that you want. For instance, if you guess 1, GraphCalc will return 1.618^*.

The other method of using the equation solver involves just a single side of an equality. For instance, if you enter "3x^2-8x+3" GraphCalc will find the roots. This occurs when the equation equals 0. This equation equals 0 when x = 0.451.

* 1.618... is what is known as the golden ratio. The number has many fun properties. Look it up on a search engine for lots of information.