How do you find $abs( -2-i )$ ?

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Answer 1 · 2016-03-24T09:28:31

$|-2-i|=2.236$

Finding $|-2-i|$ means finding the modulus of complex number $-2-i$ .

As modulus of a complex number $a+bi$ is given by $sqrt(a^2+b^2)$

$|-2-i|=sqrt((-2)^2+(-1)^2)=sqrt(4+1)=sqrt5=2.236$

How do you find abs( -2-i )abs( -2-i )?