The complex number is 2 - i.
In complex plane vertical axis represent the imaginary axis and horizontal axis respresent the real axis.
Plot the point on complex plane.
The absolute of a complex number a + bi is,
[tex]A=\sqrt[]{a^2+b^2}[/tex]
Determine the absolute value of complex number 2 - i.
[tex]\begin{gathered} A=\sqrt[]{(2)^2+(-1)^2} \\ =\sqrt[]{4+1} \\ =\sqrt[]{5} \end{gathered}[/tex]
So absolute value is,
[tex]\sqrt[]{5}[/tex]
