Find a polar equation of the conic in terms of r with its focus at the pole.
Conic: hyperbola, Vertices: (5,pi/2), (2,pi/2)
What I did is found the center to be (7/2,pi/2), so c=7/2, a=3/2, e=7/2/3/2=7/3
Then the horizontal directrix above the pole
Can someone help with where I went wrong?