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Pammie123cakess Pammie123cakess
  • 04-06-2014
  • Mathematics
Answered

how do I solve (3+i)(3-i)

Verified Answer :

kate200468
kate200468 kate200468
  • 04-06-2014

\((3+i)(3-i)=3(3-i)+i(3-i)=9-3i+3i-i^2=9-(-1)=\\\\=9+1=10\)

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kayt91
kayt91 kayt91
  • 04-06-2014

(3+I)(3-1)
-i^2+9=0
-I^2=-9
I^2=9
i= + or - 3

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