A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 5 years ago

This is the last one for now. I hope you guys are on when I take my quiz because there are two problems like this on that I can't get. 1/9x^2+11/3x=432

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

    This is just like the last problem except where there was 80 you put 432

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

    multiply every term by x^2 and then solve using the quadratic formula.

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

    i think the x^2 is suppose to be in the numerator

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

    adfriedm I believe the x^2 is on top... just guessing.

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

    fair enough

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

    I don't get the quadratic formula. To me it doesn't make sense

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

    Blasphemy

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

    you can find that formula if you complete the square for ax^2+bx+c=0 so it makes perfect sense

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

    is it (1/9)x^2+(11/3)x=432 or 1/(9x^2)+11/(3x)=432?

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

    1 Attachment
  11. anonymous
    • 5 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    of course it requires a to be non-zero

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

    rihgt! because the quadratic formula is undefined for a=0

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

    well moreover because the proof doesn't follow with a=0

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

    You're just arguing semantics...

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

    not in the slightest

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

    I think what confuses me and I know this is stupid. What is the + sign with the line under it?

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

    it means you have 2 annswers one with + and one with minus

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

    Ok but how do I work this if I have a + and - answer. I'm sorry I just don't get it

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

    \[{-b+\sqrt{b^2-4ac}}/(2a) and ( -b-\sqrt{b^2-4ac})/(2a)\]

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

    it is the a quadratic equation, so we always expect 2 values which make it zero.

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

    OH ok. You guys are a life saver!!! thank you

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

    \[\frac{1}{9 x^2}+\frac{11}{3 x}=432 \] Put the 432 on the left hand side of the equation and combine terms into one fraction. \[\frac{1+33 x-3888 x^2}{9 x^2}=0 \] If the fraction is zero, the Numerator is zero. Factor the Numerator and set the result to zero. x = 1/48 and x = -1/81

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

    Thank you

  24. 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.