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

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Answer 1 · 2016-03-24T09:28:31

$| - 2 - i | = 2.236$ $|-2-i|=2.236$

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

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

$| - 2 - i | = \sqrt{{(- 2)}^{2} + {(- 1)}^{2}} = \sqrt{4 + 1} = \sqrt{5} = 2.236$ $|-2-i|=sqrt((-2)^2+(-1)^2)=sqrt(4+1)=sqrt5=2.236$

How do you find |−2−i|abs( -2-i )?