Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

starrhunter Group Title

rationalize the denominator of √-16 _________ (1+i)+(6+3i)

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. m_charron2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    -16 can be written as the product of 16 and -1, right? so what's the sqrt of 16 and the sqrt of -1?

    • 2 years ago
  2. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i haven't any idea

    • 2 years ago
  3. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1337100713360:dw|

    • 2 years ago
  4. m_charron2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    ok, sqrt of 16, what multiplied with itself gives 16?

    • 2 years ago
  5. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    4

    • 2 years ago
  6. m_charron2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    ok, what about -1?

    • 2 years ago
  7. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    im not sure about the -1

    • 2 years ago
  8. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    there isnt an answer for that... right?

    • 2 years ago
  9. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1337100894030:dw|

    • 2 years ago
  10. m_charron2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    ok, I'll give you that one, because it's a bit tricky, it's actually i. i * i = -1

    • 2 years ago
  11. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    i times i. got it.

    • 2 years ago
  12. m_charron2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    ok, perfect, so sqrt of -16 = sqrt 16 * sqrt -1 = 4 * i

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

    but its negative 16 under the square root....

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

    and none of that is one of my choices

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

    all of my choices look like fractions

    • 2 years ago
  16. m_charron2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    Yup, and it's still works because of this : \[\sqrt{xy} = \sqrt{x} * \sqrt{y}\] right, so once you solve the the denominator, go back to hashsam1's solution

    • 2 years ago
  17. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1337101077852:dw|

    • 2 years ago
  18. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    so it would be

    • 2 years ago
  19. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1337101138650:dw|

    • 2 years ago
  20. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    thank you so much for all of your help!

    • 2 years ago
  21. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    is this the answer?

    • 2 years ago
  22. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    in your choices?

    • 2 years ago
  23. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    its 16 + 28i over 65

    • 2 years ago
  24. m_charron2 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    perfect

    • 2 years ago
  25. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1337101312782:dw|

    • 2 years ago
  26. starrhunter Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    yay!

    • 2 years ago
  27. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1337101388901:dw|

    • 2 years ago
    • Attachments:

See more questions >>>

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.