A quadratic equation is a polynomial equation, with one unknown in which the highest power of the unknown is 2. Also called second degree equation in the unknown. The general or standard form of a quadratic equation is:

Examples:

4x

5x

3x

All of the above equations are quadratic equations .

Thus, 4x

To solve a quadratic equation is to determine the values of the unknown which will satisfy the equation. The numbers that will satisfy a quadratic equations are called: solutions or roots. In the event, that the solutions or roots of a quadratic equation are:

1) Real numbers like 3, - 5, √3, 1.65...then the roots are said to be real.

2) If the equation is satisfied by numbers like √-3, √-5, √-5.25..., the roots are said to be imaginary. Such solutions belong to the complex number system.

There are other methods for solving quadratic equations. They are:

Standard Form of Quadratic Equation

Solving Quadratic Equations by factoring.

Solving incomplete Quadratic Equations.