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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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Parabolas: Directrix, Focus, Vertex (MATHguide) View |
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Parabolas Complete Guide - Graphing and Writing Equations Using Focus, Directrix, and Vertex (Mario's Math Tutoring) View |
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Writing the equation of a parabola given focus and directrix (Brian McLogan) View |
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How to Find the Focus and Directrix of a Parabola (searching4math) View |
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Finding the focus of a parabola of the form ay 2 + by + cx + d = 0 or ax 2 + bx + cy + d = 0 (Timely Math Tutor) View |
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Algebra II: Focus of a Parabola (Mr. P: Math and Technology) View |
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What is the Focus and Directrix of a Parabola (Ryne Roper) View |
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How to find the focus of a parabola given an equation (Brian McLogan) View |