Find the Directrix y-17=-(x-3)^2

Math
Add to both sides of the equation.
Use the vertex form, , to determine the values of , , and .
Find the vertex .
Find , the distance from the vertex to the focus.
Tap for more steps…
Find the distance from the vertex to a focus of the parabola by using the following formula.
Substitute the value of into the formula.
Cancel the common factor of and .
Tap for more steps…
Rewrite as .
Move the negative in front of the fraction.
Find the directrix.
Tap for more steps…
The directrix of a parabola is the horizontal line found by subtracting from the y-coordinate of the vertex if the parabola opens up or down.
Substitute the known values of and into the formula and simplify.
Find the Directrix y-17=-(x-3)^2

Download our
App from the store

Create a High Performed UI/UX Design from a Silicon Valley.

Scroll to top