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14-08-2018
Mathematics

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What is the absolute value of -4 - 9i ?

a) -13
b) 5
c) √65
d) √97

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WojtekR WojtekR

14-08-2018

[tex] |-4-9i|=\sqrt{(-4)^4+(-9)^2}=\sqrt{16+81}=\boxed{\sqrt{97}} [/tex]

Answer d)

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