Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

gandalfwiz

  • 2 years ago

How to factor 8x^3 -125?

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

    It's part of a larger problem, 16x^5 -250x^2, and I saw that you could factor out a 2x^2 but don't know what to do next.

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

    You have the difference of 2 perfect cubes: \[a ^{3} - b ^{3} = (a - b)(a ^{2} + ab + b ^{2})\]where a = 2x and b = 5

  3. tcarroll010
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Once you make your substitutions for "a" and "b", you won't be able to factor\[a ^{2} + ab + b ^{2}\]unless you can go with complex number solutions.

  4. tcarroll010
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Hi Luis, and ughh, uhh, thanks! @Luis_Rivera

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

    Oh, that makes sense. Thanks!

  6. tcarroll010
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    uw!

  7. 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.