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Parabola: Equation

How to use a parabola equation to find the focus and the directrix (and vice versa): definition, formula, 6 examples, and their solutions.

Definition

Formulay2 = 4px

ExampleFocus

ExampleDirectrix

ExampleParabola Equation

Formulax2 = 4py

ExampleFocus

ExampleDirectrix

ExampleParabola Equation