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William Sydney Porter tried to perform the calculation (3 + 4i)/(1 - 2i). However, he accidentally missed the minus sign, finding (3 + 4i)/(1 + 2i) = 11/5 - 2/5*i.

What answer should he have obtained?

 Mar 6, 2021
 #1
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Multiply the numerator and denominator by   1 + 2i

 

to get

 

(-5 + 10i)/5  =   -1 + 2i

 Mar 6, 2021

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