Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

WhiteRabbit

  • 3 years ago

64x^3+8=0 I know what the answers SHOULD be, I'm just so confused how to get there.

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

    huh?

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

    are you asked to solve for x or expand?

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

    isn't it the sum of a square but in cubic form so you have 4x and 2 and then you get (4x+2) = 0 and (4x^2+8x+4)

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

    i'm having trouble when using the quadratic formula because i get that x = -1/2 (right) and x=-1 which is wrong.....

  5. Algebraic!
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    you're just asked to solve for x it looks like.. that's pretty easy

  6. Algebraic!
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    subtract 8 from both sides and divide both sides by 64

  7. Algebraic!
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    x^3 = -1/8

  8. Algebraic!
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    take the cube root of both sides x=-1/2

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

    i already got that part, i need the other two x's

  10. 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