Question 436434
Write the equation of the circle given the center and the radius 
C(4,-5) r=root 8
..
Standard form of a circle: (x-h)^2+(y-k)^2=r^2
(h,k) =(x,y) coordinates of the center
r=radius
for given problem:
Equation of circle: (x-4)^2+(y+5)^2=8