TUTORIALS:

Solving Quadratic Equations by Using the
Quadratic Formula
You can use the quadratic formula to solve any quadratic equation involving
any variable.
The Quadratic Formula
The solutions of a quadratic equation in the form ax^{2} + bx + c = 0, where a 0, are given
by the formula
Example 1
Use the quadratic formula to solve x^{2}  2x  5 = 0.
Solution
In the equation x^{2}  2x  5 = 0, a = 1, b = 2, and c = 5.
Substitute these values into the quadratic formula.
The solutions are approximately 3.45 and 1.45.
