Find an equation of the parabola with focus (2,4) and directrix y=-2. Please help me or just give me an idea on how to answer this... Thanks!
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Originally Posted by lance Find an equation of the parabola with focus (2,4) and directrix y=-2. Please help me or just give me an idea on how to answer this... Thanks! Use the definition of a parabola: The point P(x, y) is situated on a parabola if it's distance to the focus equals it's perpendicular distance to the directrix. Get rid of the square-root by squaring the equation. Afterwards simplify.
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