Question

How do you find the absolute value of `-2-i`?

Answer 1

`|-2-i|=sqrt5`

Explanation:

Absolute value of a complex number `a+ib` is written as `|a+ib|` and its value as `sqrt(a^2+b^2)`.

Hence, absolute value of `-2-i` is `sqrt((-2)^2+(-1)^2)=sqrt(4+1)=sqrt5`.