Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

lornbeach

  • 2 years ago

Simplify the given expression:

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

    1 Attachment
  2. maym0Re97
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i7/1+9i

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

    thats not an answer choice

  4. maym0Re97
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What are the choices?

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

    7+7i/2 63+7i/82 -7+7i/2 -63+7i/82

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

    \[ \sqrt{-49} = \sqrt{49 \dot\ -1} = \sqrt{49} \sqrt{-1} = 7i \\(3 + 4i) - (2 - 5i) = (3 - 2) + (4i + 5i) = 1 + 9i \]

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

    I have to agree with @maym0Re97

  8. maym0Re97
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Lol that's what I got, but it's not an answer choice

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

    i got that answer as well, but it isnt a choice

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

    There's probably an equivalent choice

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

    Multiply top and bottom by 1 - 9i and see what happens

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

    would it be 63+7i/82?

  13. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    your job is to rewrite in standard form as \(a+bi\) which means do what @hero said

  14. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\frac{7i}{1+9i}\times \frac{1-9i}{1-9i}\] the denominator is \(1^2+9^2=82\) all the work is in the numerator

  15. satellite73
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes you have it

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

    thank you(:

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.