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softballislove3

Find the product of the complex number and its conjugate. 1 + 3i Answer : 1 - 9i correct??

  • one year ago
  • one year ago

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  1. hereweg0
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    multipy that and 1-3i

    • one year ago
  2. hereweg0
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    so yu will get 10

    • one year ago
  3. katiebugg
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    was gonna say that :P

    • one year ago
  4. hereweg0
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    whatever katie... lies.

    • one year ago
  5. softballislove3
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    thank you

    • one year ago
  6. hereweg0
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    welcome. anytime.

    • one year ago
  7. katiebugg
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    i was typyin was i not :P

    • one year ago
  8. jim_thompson5910
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    In general (a+b)(a-b) = a^2-b^2 So (1+3i)(1-3i) 1^2 - (3i)^2 1 - 9i^2 1 - 9(-1) 1+9 10 which means (1+3i)(1-3i) = 10

    • one year ago
  9. softballislove3
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    thanks @jim_thompson5910

    • one year ago
  10. jim_thompson5910
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    you're welcome

    • one year ago
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