Math Problem with Hyperbola

[Guest McGrady]

THe questions states:

 

Using the locus appraoch(definition) of the hyperbola to write the equation of the hyperbola with centre (o,0) foci (17,0) (-17,0) and difference of the focal radii 30.

 

How do i solve this?

[Guest McGrady]

no one has any idea how to do this?

[uncool]

Just write it out from what hte problem says.

You know the foci.

You know the difference between the distance to those foci.

So try to figure out: what equation will I need to do this?

-Uncool-