Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

itsjustme_lol

  • 2 years ago

Operations on Complex Numbers

  • This Question is Closed
  1. itsjustme_lol
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    simplify the expression

    1 Attachment
  2. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ok so start by rewrite \[\sqrt{-10}=i \sqrt{10}\]

  3. itsjustme_lol
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok, im following

  4. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Do you get that idea?

  5. itsjustme_lol
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes I understand that i believe

  6. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Do the same with sqrt(-5)

  7. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Then distribute

  8. itsjustme_lol
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok so its i\[\sqrt{-5}\]

  9. itsjustme_lol
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hang on

  10. itsjustme_lol
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1355782789409:dw|

  11. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Not really, the reason for why you take out the i is that you want the minus under the squareroot to disappear

  12. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[i \sqrt{5}\]

  13. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Do you know the definition of i?

  14. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[i=\sqrt{-1}\] \[i ^{2}=-1\]

  15. itsjustme_lol
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    well i know that i means the y on a plane and it is the imaginary part?

  16. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    That's also, kind of, correct when dealing with imaginary numbers the Y-X plane is called Im-Re

  17. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So based on the definition of \[i=\sqrt{-1}\] what's, for example \[\sqrt{-7}\]

  18. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

  19. frx
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[i \sqrt{10}(11+i \sqrt{5})\]=\[11i \sqrt{10}+i ^{2}\sqrt{10}\sqrt{5}= 11i \sqrt{10}-\sqrt{50}\]

  20. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.