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Quadratic Equation A general quadratic equation is of the general form: ax2 + bx + c = 0, where a, b and c are constants and a  0.
The values of x which satisfy the above equation are called the roots of the equation. They are found using this equation: 
b2 - 4ac is called the discriminant of the equation (symbol  ). When:
> 0, the roots will be real and different
= 0, the roots will be real and equal
< 0, the roots will be complex
The roots of a quadratic equation are denoted by the Greek letters  and  . The following can then be assumed:
and 
and the quadratic equation can then be re-written as:  .
The following useful results can used when analysing roots of a quadratic:     .
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