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

morganalana17

factoring

  • one year ago
  • one year ago

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

    Its the difference of cubes (since 216 is 6^3 and 1 is 1^3), so use the difference of cubes formula.

    • one year ago
  2. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 0

    216x^3 - 1 = (6x)^3 - 1^3 Now, let 6x = a and let 1 = b a^3 - b^3 = (a - b)(a^2 + ab + b^2) So, just substitute for the a and the b. Can you do this part?

    • one year ago
  3. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 0

    @morganalana17 ? Can you do this last part?

    • one year ago
  4. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 0

    Once you get the function factored as indicated above, the second factor (which is a quadratic in x) cannot befactored any further for real solutions so you will have only one real soultion (one place where the x-axis is crossed). The function will of course have 2 more solutions but those will be imaginary solutions. The graph looks like:

    • one year ago
    1 Attachment
  5. tcarroll010
    Best Response
    You've already chosen the best response.
    Medals 0

    (6x - 1)(36x^2 + 6x + 1)

    • 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.