A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Rationalize the denominator of square root of negative four over open parentheses 7 minus 3 I close parentheses plus open parentheses 2 plus 5 i.

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    medal for anyone who can quickly go through this with me .

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

    Draw the expression

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1441508343904:dw|

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Hero

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    combine like terms in the denominator

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    quantity of negative 16 plus 18 I over 7 quantity of 16 plus 18 I over 145 quantity of 4 plus 18 I over 85 quantity of negative 4 plus 18 I over 77

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    these r the answers they gave me

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cool. can you combine the like terms in the denominator

  9. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    9+2i

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah so now you need to multiply both the numerator and denominator by the conjugate, which is 9 - 2i. You can also rewrite the numerator as 2i \[\frac{ 2i(9-2i) }{ (9-2i)(9+2i) }\]

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Distribute in the numerator. Use FOIL/difference of squares in the denominator. The i's will cancel in the denominator

  12. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    they don't really cancel i^2 = -1

  13. triciaal
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh maybe you meant the term with i sorry

  14. 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.