Editing QuadraticEquation
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[[[>50 Some caution is advised in using this solution. When /b/ is much, much larger than /a/ and /c,/ the usual formula loses several places of accuracy. A better solution is: |>> | EQN:x_1=-\left(\frac{b+\text{sgn}(b)sqrt{b^2-4ac}}{2a}\right) | EQN:x_2=\frac{c}{ax_1} | <<| Numerical analysis can be a very difficult topic. ]]] The general quadratic equation has the form EQN:ax^2+bx+c=0. The general solution is given by: |>> | EQN:x=\frac{-b\pm\sqrt{b^2-4ac}}{2a} | <<| A similar, but much more complex solution is possible for the cubic equation; and an even worse one for the quartic equation. Beyond that (quintic equation and higher) no such solution exists. * http://en.wikipedia.org/wiki/Quadratic_equation