You can use the Graphing Calculator to find the **x-intercepts** of a function by pressing the **Solve** button. The graphing calculator solves the resultant **equations in one variable**. The solutions are the **zeros** or **roots** of a **function**.

If the function is *not* **constant** it solves the equation **f(x) = 0** [or **r(θ) = 0**, in polar case] on a bounded interval. The solution set is the **x-intercepts** of the **Cartesian graph** of the function on the bounded interval.

Remark: To solve the equation **x ^{2} - 3x + 2 = 0**, just type in the left hand side and press

There are trivial cases that you will find *extraneous* "**roots**" or "**x-intercepts**" appear because of round off error. This can happen when the graph of the function is very close to the x-axis on a sub-interval. For example, the graph of x^{10} is very close to the x-axis on a sub-interval about 0 which produces "unwanted **roots**".

It is always helpful to look at the graph when finding the **x-intercepts** of functions.

To solve a system of linear equations try the Linear System Solver by entering the relevant *augmented matrix*.