# How do you find the vertex, focus, and directrix of the parabola #y^2-4y-4x=0#?

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Narad T.
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Jan 4, 2017

#### Answer:

The vertex is V

The focus is F

The directrix is

#### Explanation:

Let's rearrange the equation and complete the squares

Comparing this equation to

The vertex is V

The focus is F

The directrix is

graph{(y^2-4y-4x)(y-100x-200)=0 [-10, 10, -5, 5]}

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