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Lösung 3.2:4b

Aus Online Mathematik Brückenkurs 2

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We calculate what the expression will be

(2−i)+(5+3i)=2+5+(−1+3)i=7+2i

and then calculate the magnitude,

7+2i=72+22=49+4=53. 


Note: It is not possible to calculate the magnitude of the terms individually

(2−i)+(5+3i)=2−i+5+3i.
Von „http://wiki.math.se/wikis/2009/bridgecourse2-TU-Berlin/index.php/L%C3%B6sung_3.2:4b“