Quadratic Equation:
A quadratic equation is a specific type of equation written on the standard form:
 where .
The Zero Product Rule:

If , then  or

Square Root Method:
If and are algebraic expressions such that then or

Completing the Square Method:
Completing the square consists of adding to both sides of an equation a positive number that can help factor a quadratic equation.

Quadratic Formula:
The solution of a quadratic equation of the form  depends on the sign of the discriminant .

Quadratic Inequality:
A quadratic inequality is a quadratic equation where the equality sign is replaced by an inequality.

Quadratic Function:
A quadratic function is a function where for each the real number  a, b, and c are real numbers with a not equal to 0.

Parabola:
A parabola is the graph of a quadratic function.

Vertex:
A vertex is the point where the parabola intersects the axis of symmetry.

This tutorial describes the properties of quadratic functions and what they are. Quadratic equations are solved using the square root method. Completing the square of a quadratic equation is shown in some of the examples. The use of the quadratic formula is discussed in some of the examples.

The difference between quadratic equations and quadratic inequalities is shown in some of the examples. Quadratic inequality solving techniques are mentioned in some of the examples. Finally, the use of the quadratic equation graphs is shown in some examples. The vertex and the axis of symmetry are defined with the use graphical examples

Specific Tutorial Features:
• Step by step examples are shown to introduce quadratic equations, square root method, and graphs of quadratic functions.
• The quadratic equation and the quadratic formula are shown with the use of examples. Concept questions are asked to test the important ideals of quadratic equations.

Series Features:
• Concept map showing inter-connections of new concepts in this tutorial and those previously introduced.
• Definition slides introduce terms as they are needed.
• Visual representation of concepts
• Animated examples—worked out step by step
• A concise summary is given at the conclusion of the tutorial.