cowgrl4life29 cowgrl4life29
  • 08-11-2017
  • Mathematics
contestada

(2 + 5i)(2 + i)

please help me to understand how to do it

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choixongdong
choixongdong choixongdong
  • 08-11-2017
(2 + 5i)(2 + i) 
= 4 + 10i + 2i + 5i^2
= 4 + 12i + 5i^2
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