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Focus and Directrix of a Parabola(HD) (Brightstorm) View |
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Focus and directrix introduction | Conic sections | Algebra II | Khan Academy (Khan Academy) View |
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Parabola Find Vertex, Focus, Directrix, and Graph (Mario's Math Tutoring) View |
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How to Find the Focus and Directrix of a Parabola (searching4math) View |
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Parabolas: Directrix, Focus, Vertex (MATHguide) View |
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Writing the equation of a parabola given focus and directrix (Brian McLogan) View |
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Conic Sections, Parabola : Find the Focus and Directrix (Patrick J) View |
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Focus and Directrix of a Parabola Explained (Screened-Instructor) View |
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What is the focus and directrix of a vertical parabola (Brian McLogan) View |
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Master finding the focus and directrix of a parabola with vertex at the center (Brian McLogan) View |