Step 1
To find the absolute value of the given complex numbers.
a. Given complex number is z=3+4i
Absolute value of a complex number is the distance of complex number from origin.
It is given by
Absolute value of the given complex number will be:
=5
Step 2
b. Given complex number is z=−1−2i
Absolute value of given complex number will be:
Hence, absolute value is .