The value of $|z - 5|$if $z = x + iy$, is
$\sqrt {{{(x - 5)}^2} + {y^2}} $
${x^2} + \sqrt {{{(y - 5)}^2}} $
$\sqrt {{{(x - y)}^2} + {5^2}} $
$\sqrt {{x^2} + {{(y - 5)}^2}} $
If $z_1, z_2 $ are any two complex numbers, then $|{z_1} + \sqrt {z_1^2 - z_2^2} |$ $ + |{z_1} - \sqrt {z_1^2 - z_2^2} |$ is equal to
The conjugate of complex number $\frac{{2 - 3i}}{{4 - i}},$ is
If ${z_1}$ and ${z_2}$ are any two complex numbers then $|{z_1} + {z_2}{|^2}$ $ + |{z_1} - {z_2}{|^2}$ is equal to
$(z + a)(\bar z + a)$, where $a$ is real, is equivalent to
If $\frac{{z - i}}{{z + i}}(z \ne - i)$ is a purely imaginary number, then $z.\bar z$ is equal to