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WhiteRabbit Group Title

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

  • one year ago
  • one year ago

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  1. WhiteRabbit Group Title
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    huh?

    • one year ago
  2. Algebraic! Group Title
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    are you asked to solve for x or expand?

    • one year ago
  3. WhiteRabbit Group Title
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    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)

    • one year ago
  4. WhiteRabbit Group Title
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    i'm having trouble when using the quadratic formula because i get that x = -1/2 (right) and x=-1 which is wrong.....

    • one year ago
  5. Algebraic! Group Title
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    you're just asked to solve for x it looks like.. that's pretty easy

    • one year ago
  6. Algebraic! Group Title
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    subtract 8 from both sides and divide both sides by 64

    • one year ago
  7. Algebraic! Group Title
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    x^3 = -1/8

    • one year ago
  8. Algebraic! Group Title
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    take the cube root of both sides x=-1/2

    • one year ago
  9. WhiteRabbit Group Title
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    i already got that part, i need the other two x's

    • one year ago
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spraguer (Moderator)
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