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

cuban_mind

(x/x-3)^2-2(x/x-3)-15=0

  • one year ago
  • one year ago

  • This Question is Open
  1. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    If you write it in proper math notation:\[\left( \frac{ x }{ x-3 } \right)^2-2\left( \frac{ x }{ x-3 } \right)-15=0\]you see that it looks like a quadratic equation... So set p=x/(x-3) to get:\[p^2-2p-15=0\] Solve for p. Then remember that p=x/(x-3) and solve that for x!

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

    Yeah whenever I do that I get x=5 and x=-3 but I don't know how to go from there

    • one year ago
  3. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    But you get p=5 and p=-3, so you still have to do solve\[\frac{ x }{ x-3 }=5\]and\[\frac{ x }{ x-3 }=-3\]I will get you started with these:\[\frac{ x }{ x-3 }=\frac{ 5 }{ 1 }\]You see two equal fractions. In general this can be dealt with the following way:\[\frac{ a }{ b }=\frac{ c }{ d } \Leftrightarrow ad=bc\]So do the multiplications and then solve for x.

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

    X=9/2 and x= 5/2

    • one year ago
  5. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Hold on, let me do it myself... ;)

    • one year ago
  6. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    I've found different solutions, I'm afraid...\[x \cdot 1=5 \cdot (x-3) \Leftrightarrow x=5x-15 \Leftrightarrow 4x=15\]so x=15/4. Maybe you forgot to multiply 5 and -3?

    • one year ago
  7. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Second one: x*1=-3*(x-3), so x=-3x+9, 4x=9, x=9/4 So I've got 15/4 and 9/4

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

    ok let me see how you did it lol

    • one year ago
  9. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    I just did...!

    • one year ago
  10. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Do you understand what went wrong?

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

    No, I don't see how you get 5/1

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

    oh wait! I get it nvm!

    • one year ago
  13. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Welcome!

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

    Thank you so much! I was so lost! lol

    • one year ago
  15. ZeHanz
    Best Response
    You've already chosen the best response.
    Medals 1

    Next time, you won't be!

    • 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.