Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Helenshouse

  • 2 years ago

Divide: 5x^2-20x/4x-9 divide by x-4/4x-9

  • This Question is Closed
  1. saifoo.khan
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\frac{5x^2-20x}{4x-9} \div \frac{ x-4}{4x-9 }\]Change the divide sign: \[\frac{5x^2-20x}{4x-9} \times \frac{ 4x-9}{x-4 }\]

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

    Ok I get that part, then what?

  3. kmalone99
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    factor a 5x out of the top and you get 5x(x-4)

  4. saifoo.khan
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[\frac{5x^2-20x}{\cancel{4x-9}} \times \frac{ \cancel{4x-9}}{x-4 }\]

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

    Do you see something in the top and bottom that can cancel out before you do any factoring?

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

    @saifoo.khan just illustrated my point

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

    I was going to say 4x-9

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

    Change sign, cancel out, what is the next step

  9. saifoo.khan
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1350791060484:dw|

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

    factor out a common multiple would be the next step illustrated above

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

    Ohhh I get it!

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

    We got lucky with this problem and you can see another canceling out possibility

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

    yes

  14. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.