\"\"

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The directrix is x = 3.

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The axis of the parabola is vertical passing through (h, k) = (0, 0)

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The directrix is \"\"

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\"\"                            (Replace \"\")

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\"\"                              (Simplify)\"\"

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The standard form is \"\"

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\"\"                     (Replace \"\")

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\"\"                        (Simplify)\"\"

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The standard form of the parabola is \"\".