Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! How to solve a quadratic equation.
The quadratic equation can be expressed as
a x 2 + b x + c = 0 (1)
which can be solved for the two alternatives of x as
x 1,2 = (-b ± (b 2 - 4 a c) 1/2) / (2 a) (2) Example - Solving Quadratic Equation
a = 1
b = 6
c = 5
then the two alternatives for
x can be calculated as
x 1 = (-6 + (6 2 - 4 1 5) 1/2) / (2 1)
x 2 = (-6 - (6 2 - 4 1 5) 1/2) / (2 1)
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