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InsanelyChaotic

  • 3 years ago

Please help me? :) Rationalize the denominator of √-49/(7-2i) - (4+9i) My answer: 49+21i/58

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  1. RajshikharGupta
    • 3 years ago
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    plz put brackets after each expression so that ur ques get clear to me

  2. InsanelyChaotic
    • 3 years ago
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    ok koala ;0

  3. mark_o.
    • 3 years ago
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    √-49/(7-2i) - (4+9i) is this like this? \[\sqrt{(\frac{ -49 }{ 7-2i })}-(4+9i)?\]

  4. mark_o.
    • 3 years ago
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    or is it like this? \[\sqrt{\frac{ -49 }{ 7-2i }-(4+9i)}?\]

  5. InsanelyChaotic
    • 3 years ago
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    yes!!! :))

  6. mark_o.
    • 3 years ago
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    or is it like this? \[\sqrt{\frac{ -49 }{(7-2i)-(4+9i) }}\]?

  7. mark_o.
    • 3 years ago
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    which one now? the first, second or the third?

  8. InsanelyChaotic
    • 3 years ago
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    the former was correct ;)

  9. InsanelyChaotic
    • 3 years ago
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    the first one :)

  10. mark_o.
    • 3 years ago
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    ok the first one is \[\sqrt{\frac{ -49 }{ 7-2i }( \frac{ 7+2i }{ 7+2i })}-(4+9i)\] \[\sqrt{\frac{ -49(7+2i) }{ 49-4i ^{2} }}-(4+9i)\] \[\sqrt{\frac{ -49(7+2i) }{ 49-4(-1) }}-(4+9i)\] can you further simplify them ?

  11. InsanelyChaotic
    • 3 years ago
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    No

  12. mark_o.
    • 3 years ago
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    = sqrt[(-343-98i)/53]-(4+9i) =sqrt[-6.472-1.85i]-(4+9i)

  13. mark_o.
    • 3 years ago
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    ok i think we cant simplify them any more :D

  14. InsanelyChaotic
    • 3 years ago
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    thank you kind sir!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11111

  15. mark_o.
    • 3 years ago
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    ok YW have fun now and good luck ... :D

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