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

andriod09

I need help on a Factoring problem. Its factoring a fraction, on top of another factoring fraction. Its in the comments

  • one year ago
  • one year ago

  • This Question is Closed
  1. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\huge\frac{\frac{30x^2+27x+6}{9x^2-49}}{\frac{30x+15}{30x-70}}\]

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

    The size of those fraction bars is important. The top two appear to be the same length, and the third is smaller. Correct?

    • one year ago
  3. strawberry17
    Best Response
    You've already chosen the best response.
    Medals 0

    To factor the numerator of the top fraction, you would divide each number by 3 and get: 3(10x^2 + 9x +2)

    • one year ago
  4. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    no, the fracton bar on the top is supposed to be in the middle, i.e. it should be the top fraction normal bar, then solid black bar, then bottom fraction normal. @strawberry17 how would i do that?

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

    \(\Huge \frac{30x^2+27x+6}{9x^2-49} \div\frac{30x+15}{30x-70}\) \(\Huge =\frac{30x^2+27x+6}{9x^2-49} *\frac{30x-70}{30x+15}\)

    • one year ago
  6. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    its supposed to be: \[\frac{30x^2+27x+6}{9x^2−49}\] over with the solid black line, \[\frac{30x+15}{30x−70}\]

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

    Like I put, Andriod?

    • one year ago
  8. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    i don't understand what you did.

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

    One fraction divided by another fraction.

    • one year ago
  10. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    i don't know. i tried to put it like it is in the book. thats what it says,

    • one year ago
  11. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, but i get very confused with fraction.

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

    Okay, Andriod, when we divide by a fraction, it's the same as multiplying by the reciprocal. That is, \(\div 2\) is the same as \(\large *\frac{1}{2}\) \(\large \div\frac{2}{3}\) is the same as \(\large *\frac{3}{2}\)

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

    etc. So when we see \(\huge\div \frac{30x+15}{30x-70}\) it's easier for us if we rewrite it as \(\huge *\frac{30x-70}{30x+15}\)

    • one year ago
  14. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    ik that much, but i don't know what to do wit hthe FRACTIONS, i.e. i know the KFC method, but what/how do i factor the fraction?

    • one year ago
  15. strawberry17
    Best Response
    You've already chosen the best response.
    Medals 0

    @andriod09 do you understand how I factored out 3 from the numerator of the top fraction?

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

    What does KFC stand for?

    • one year ago
  17. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    K=keep F=flip C=change @strawberry17 i have not a clue.

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

    Andriod, look for a common factor. With \(30x^2 + 27x + 6\) you can notice that 30=3*10 27= 3*9 6= 3*2 so they have a common factor of 3.

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

    I agree, Strawberry. Rewriting it is good, but it's good to keep it factored as it is.

    • one year ago
  20. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    i don't understand. \[:(\]\[:L\]\[:/\]

    • one year ago
  21. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    yes. i undertand what factoring is. I don't konw how to factor a fraction. hence, why this post is here.

    • one year ago
  22. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    FACTORING A FRACTION IS ALL I DO NOT KNOW. I KNOW HOW TO FACTOR SOMETHING LIKE THIS: \[x^2+3-27\]

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

    Factoring a fraction is not different from factoring normally. Just look at the top and factor it normally. Then look at the bottom and factor it normally.

    • one year ago
  24. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    I DON'T KNOW HOW. :/

    • one year ago
  25. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    I DON'T KNOW HOW TO FACTOR A FRACTION.

    • one year ago
  26. andriod09
    Best Response
    You've already chosen the best response.
    Medals 0

    just tell me how to do this problem please, i am getting really annoyed.

    • 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.