Question

If z = x + iy, then z - z conjugate/ z +z conjugate
is equal to​

Answer 1

Answer:

z=x+iy

z

=x−iy

Therefore, z  

z

+2(z+  

z

)+a=0

(x+iy)(x−iy)+2(x+iy+x−iy)+a=0

x  

2

+y  

2

+4x+a=0

(x+2)  

2

+(y−0)  

2

=(  

4−a

​  

)  

2

, which represents a circle for all a≤4.

Step-by-step explanation: