If (4,-2) is a point on the circle
which is concentric to
-4
0
4
1
General form of a circle -
- wherein
centre =
radius =
For concentric,
so;
Satisfying by
Option 1)
-4
This solution is correct
Option 2)
0
This solution is incorrect
Option 3)
4
This solution is incorrect
Option 4)
1
This solution is incorrect
Since both circles are concentric so coordinate of their centre is (1,-2)=(-g ,-f)
Put the given value of (x,y)=(4,-2) and "g and f "
4^2+(-2)^2+2×(-1)×4+2×2×(-2)+C=0
=> C= -4
Thank you