A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

quickstudent

  • one year ago

Can someone please help me with this? factoring a sum of cubes

  • This Question is Closed
  1. quickstudent
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    How am I supposed to write the expression here?

    1 Attachment
  2. Directrix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    One of the cubes has an edge of 1 and the other has an edge of x. As given in the problem, the volume of a cube is length times width times height. Because all those measures are the same in a cube, the volume of a cube is the cube of the measure of one of its edges.

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

    Cube I with edge of l foot has volume 1*1*1 = 1 cubic foot. Cube 2 with edge x has volume x*x*x = x^3 cubic feet.

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

    Total volume = 1 + x^3 or V = x^3 + 1. @quickstudent The title of the thread is factoring a sum of cubes. Is there another part to this?

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

    Yes, there is. Here's the whole question.

    1 Attachment
  6. Directrix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    To factor x^3 + 1, take a look at the attached pattern for doing that.

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

    Follow the pattern of the first one which is the sum of two cubes.

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

    Be brave and see what you can do. x^3 + 1 = (x + 1) * ( ? - ? + ?)

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

    Okay, this is what I got now

    1 Attachment
  10. Directrix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    @quickstudent Looks good.

  11. 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.