A) circle
B) straight line
C) parabola
D) point
Correct Answer: A
Solution :
If \[z=x+iy\Rightarrow z\overline{z}+2(z+\overline{z})+c=0\] \[\Rightarrow \] \[(x+iy)(x-iy)+2[(x+iy)\] \[+(x-iy)]+c=0\] \[\Rightarrow \] \[{{x}^{2}}-{{i}^{2}}{{y}^{2}}+2[2x]+c=0\] \[\Rightarrow \] \[{{x}^{2}}+{{y}^{2}}+4x+c=0\] which represents the equation of circle.
You need to login to perform this action.
You will be redirected in
3 sec
