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Condor34

  • one year ago

Simplify the expression sqrt -9/ (3-2i)+(1+5i)

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  1. Nnesha
    • one year ago
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    first combine like terms

  2. Nnesha
    • one year ago
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    \[\huge\rm \frac{ \sqrt{-9} }{ 3-2i+1+5i }\]

  3. condor34
    • one year ago
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    12-9i/25 12-9i/7 9+12i/25 9+12i/7

  4. condor34
    • one year ago
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    and yes

  5. condor34
    • one year ago
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    square root of 9 over 4 plus 3i?

  6. condor34
    • one year ago
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    -9*

  7. Nnesha
    • one year ago
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    alright and you separate -9 \[\sqrt{-1} \times \sqrt{9}\] and i =what ?

  8. Nnesha
    • one year ago
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    yep right

  9. condor34
    • one year ago
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    i = imaginary number? or -1

  10. Nnesha
    • one year ago
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    i imaginary

  11. Nnesha
    • one year ago
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    general question

  12. condor34
    • one year ago
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    ok

  13. Nnesha
    • one year ago
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    \[\bf i = \sqrt{-1}\] \[\bf i^2 = -1\] and that's why we have to seprate of negative one and positive 9

  14. condor34
    • one year ago
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    ok

  15. Nnesha
    • one year ago
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    \[\huge\rm \frac{ \sqrt{-1} \times \sqrt{9} }{ 4-3i }\] so replace sqrt -1 by 1 and multiply both the denominator and the numerator by the conjugate of 4-3i

  16. condor34
    • one year ago
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    -9/25+12i/25?

  17. Nnesha
    • one year ago
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    nope how did you get 25

  18. condor34
    • one year ago
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    just guessed

  19. Nnesha
    • one year ago
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    why did you guess ?

  20. Nnesha
    • one year ago
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    you are not 'n the exam haall this is the time to learn not to guess :=)

  21. condor34
    • one year ago
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    Honestly I have no idea how to do this and not trying to be rude but i need the answer because i am taking a timed exam.......

  22. Nnesha
    • one year ago
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    really so it's a test question ..sorryy..

  23. condor34
    • one year ago
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    yes

  24. Nnesha
    • one year ago
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    do you know we are not allowed to help u on your test or quiz? it's against the coc

  25. condor34
    • one year ago
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    I know but i really dont understand this and i have also seen alot of people do the same thing as me

  26. Nnesha
    • one year ago
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    well..if someone don't aa bad thing then.. you don't have to follow them you will do better without cheating..

  27. condor34
    • one year ago
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    ok, thanks for the help anway

  28. Nnesha
    • one year ago
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    what is square root of 9? replace square root of -1 by i multiply by the conjugate 4-3i if you don't know what conjugate then search it

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