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 x^2+4x-3directrix directrix x^2-y=0directrix directrix-4(y-10)=(x-6)^2directrix directrix 4-7x^2directrix directrix 3x^2-x-4directrix

Frequently Asked Questions (FAQ)

  • What is the directrix (x+5)^2=-20(y-2) ?

    The directrix (x+5)^2=-20(y-2) is y=7