Respuesta :
Answer:
9^2= (x+2)^2+(y+8)^2
Step-by-step explanation:
The equation is r^2=(x+h)^2+(y-k)^2
Answer:
x2+y2-4x+16y-13
Step-by-step explanation:
center (h,k)=2,-8
radius(r)=9
we know
(x-h)2+(y-k)2=r2
now insert above given information
(x-2)2+(y+8)2=9×9