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S

how to find x in x^2-x-1 ?

  • one year ago
  • one year ago

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  1. radar
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    As is, you do not have an equation. What is that expression equal to?

    • one year ago
  2. S
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    to 0

    • one year ago
  3. lgbasallote
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    |dw:1337559134977:dw| i found x

    • one year ago
  4. radar
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    The quadratic formula seems like a good candiate. OMG lgbasallote has already found x!

    • one year ago
  5. lgbasallote
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    teachers should phrase it as solve for x :P find x is tooo easy (unless x happens to be wally)

    • one year ago
  6. S
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    that was not helpful at all , but I understand your point

    • one year ago
  7. lgbasallote
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    on a helpful note though...use either completing the square or q.f.

    • one year ago
  8. lgbasallote
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    it is not factorable...i can give you that

    • one year ago
  9. radar
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    \[x ^{2}+x-1=0\]A=1 B=1 C=-1 Use quadratic formula.

    • one year ago
  10. akamushi
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    C would be +1, when you move it to the other side of the equation

    • one year ago
  11. radar
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    x=[-1+/-sqrt(1+4]/2 \[=(-1\pm \sqrt{5})/2\]

    • one year ago
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