Enable text based alternatives for graph display and drawing entry

Try another version of this question

The equation of the hyperbola that has a center at ` (10,9) `, a focus at ` (15 , 9) `, and a vertex at ` (13 , 9 ) `, is
` \frac((x-C)^2)(A^2)-\frac((y-D)^2)(B^2)=1 `
where
` A = `  
` B = `  
` C = `  
` D = `  

Get help: