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What is the directrix of the parabola defined by `(1)/(4)(y + 3) = (x − 2)^2`?

Sagot :

MrRoyal

The directrix of the parabola is [tex]y = \frac {-49}{16}[/tex]

How to determine the equation of the directrix?

The parabola equation is given as:

[tex]\frac 14(y + 3) = (x -2)^2[/tex]

A parabola is represented as:

[tex]4p(y - k) =(x -h)^2[/tex]

By comparing both equations, we have:

4p = 1/4 ==> p = 1/16

-k= 3 ==> k = -3

The directrix is represented as:

y = k - p

So, we have:

[tex]y = -3 - \frac 1{16}[/tex]

Take the LCM

[tex]y = \frac {-16 * 3- 1}{16}[/tex]

Evaluate

[tex]y = \frac {-49}{16}[/tex]

Hence, the directrix of the parabola is [tex]y = \frac {-49}{16}[/tex]

Read more about parabola at:

https://brainly.com/question/1480401

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