INTRODUCTION
For a quadratic equation of the form \(ax^2+bx+c=0\), the quadratic formula states that
\(x={-b±\sqrt{b^2-4ac}\over2a}\)
The formula therefore gives the value(s) of the root(s) of the corresponding quadratic equation. This formula is predominantly used when the method of factorisation cannot be applied. When a question requires the roots of a quadratic equation to be given to a specified number of decimal places or significant figures, this is a clear indication that the quadratic formula should be used.