Could you please help me with this?
The standard equation of a circle is (x−h)2+(y−k)2=r2, where the point (h,k) is the center of the circle and r represents the length of the radius. If a particular circle can be represented by the equation x2+y2−8x+2y=−1, what is the radius of that circle?
-1
1
2
4
8
The standard equation of a circle is (x−h)2+(y−k)2=r2, where the point (h,k) is the center of the circle and r represents the length of the radius. If a particular circle can be represented by the equation x2+y2−8x+2y=−1, what is the radius of that circle?
-1
1
2
4
8
