Solution

directrix

Solution

Solution steps
Rewrite in the standard form
Parabola is symmetric around the y-axis and so the directrix is a line parallel to the x-axis, a distance from the center y-coordinate
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Popular Examples

directrix-2x^2+11directrix y=(x-4)(x-7)directrix y=-2x^2+6directrix y=-2x^2+7directrix y=(7x-3)^2

Frequently Asked Questions (FAQ)

  • What is the directrix-12y+10=x^2-4x+14 ?

    The directrix-12y+10=x^2-4x+14 is y=3