Ellipse Equation w/ only vertices and focus

[kitgk]

Homework Statement

Ellipse with vertex at (2,3) and (-4,3) and focus at (1,3)

Homework Equations

(x-h)²/a² + (y-k)²/b²=1

The Attempt at a Solution

(h,k)= (-1,3)
a²=9
(x+1)²/ b² + (y-3)²/ 9²

 

[LCKurtz]

You have h and k correct. What is the equation relating a, b, and c for an ellipse? Use it to figure out b. And your final equation needs and = sign and a right hand side.