Parabola Equations and Graphs: Directrix and Focus and How to Find Roots of Quadratic Equations

Explaining the math behind a curve that features more than you realised in nature and engineering.

Eugene Brennan
Math Simplified
Published in
11 min readOct 7, 2021

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© Eugene Brennan

The Parabola, a Mathematical Function

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Eugene Brennan
Math Simplified

Eugene is an engineer with a BSc(Eng) degree in Control and Instrumentation. He’s passionate about gardening, DIY, making things, cycling & photography.