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

specialistt Group Title

19. What is the value of c so that x² – 11x + c is a perfect-square trinomial? 121 –

  • one year ago
  • one year ago

  • This Question is Closed
  1. specialistt Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ignore the 121 lol

    • one year ago
  2. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    well, a perfect square is of the form (a+b)^2, which expands out to: a^2+2ab+b^2 lets compare that to what you are given x^2 –11x + c looks like a=x, and 2bx = -11x id say b = -11/2 so c = b^2

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

    i have worked it out and i cannot find the right answer.. the choices are, 121 121 over 4 -11 over 4 121 over 2

    • one year ago
  4. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    .... id say b = -11/2 so c = b^2 what praytell is (-11/2)^2 ?

    • one year ago
  5. timo86m Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    is this completing the square?

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

    -11/4?

    • one year ago
  7. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    no, -11/4 you got the /4 part right now what is (-11)^2 ?

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

    121/4.. im pretty sure that it!

    • one year ago
  9. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    \[\frac{-11}{2}*\frac{-11}{2}=\frac{(-11)^2}{(2)^2}\]

    • one year ago
  10. amistre64 Group Title
    Best Response
    You've already chosen the best response.
    Medals 3

    yes, that would be it :)

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

    okay thank you soo much! XD

    • one year 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.