X QUADRATIC EQUATIONS.

Chapter 04 

QUADRATIC EQUATIONS

 a quadratic equation is a  polynomial equation of the second degree. A general quadratic equation can be written in the form




where x represents a variable or an unknown, and a, b, and c are constants with a ≠ 0. (If a = 0, the equation is a linear equation.)
The constants a, b, and c are called respectively, the quadratic coefficient, the linear coefficient and the constant term or free term. The term "quadratic" comes from quadratus, which is the Latin word for "square". Quadratic equations can be solved by factoring, completing the square  and using the quadratic formula
A quadratic equation with real or complex coefficients has two solutions, called roots. These two solutions may or may not be distinct, and they may or may not be real.
Having

http://en.wikipedia.org/wiki/Quadratic_equation