Question

The equation $z\overline{z_1}+(4-3i)\overline{z}+5=0$ represents a circle whose radius is

• A. 2
• B. 3
• C. 4
• D. 5

Answer 1

The correct option is A 2

For a circle $z\overline{z}+\overline{g}z+g\overline{z}+c=0$
Radius of circle
$z\overline{z}+(4-3i)\overline{z}+5=0$ will be $\sqrt{25-5}=\sqrt{20}$
$=2\sqrt{5}$