Question

which of the following is |-3-6i|
a. +or- 3 root 5
b. 3 root 5
c.+or- 3i root 5
d.3 root 5i

Answer 1

its b . 3 root 5 because the modulus is never negative

Answer 2

the modulus of a complex number is its length (r)
you get it by the good old Pythagoras theorem
(-3)^2+(-6)^2=45=r^2
r=3*sqrt5

Answer 3

thanks yall