Equation of Directrix - Search Videos

Determining Directrix from Equation of Ellipse

PARABOLA: FINDING VERTEX, FOCUS AND EQUATION OF DIRECTRIX

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Finding The Focus and Directrix of a Parabola - Conic Sections

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Focus and directrix introduction | Conic sections | Algebra II | Khan Academy

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Find in video from 0:00Introduction to Focus and Directrix

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Finding focus and directrix from vertex | Conic sections | Algebra II | Khan Academy

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How to find the directrix, focus and vertex of a parabola

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Find in video from 02:22Writing the Standard Equation

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Find in video from 02:22Finding the Directrix

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Find in video from 01:04Example Problem: Vertex and Directrix

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Find in video from 01:08Drawing the Directrix and Axis

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