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Kris5 Group Title

help me please :) 1. Which expression is equivalent to radical 5+ radical 3 / radical 5 - radical 3? 2. The fraction 1-1/a divided by 1-1/a^2 is equiv. to... 3. Solve for x: 3/x-2+8/x^2-4=1

  • one year ago
  • one year ago

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  1. tkhunny Group Title
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    Please use parentheses to write what you intend. In your #1, you have written \(\sqrt{5} + \dfrac{\sqrt{3}}{\sqrt{5}} - \sqrt{3}\). I'm guessing this is not what you intended. In what I suspect you intended, multiply numerator and denominator separetely by \(\sqrt{5}+\sqrt{3}\) and see what magic happens, especially in the denominator.

    • one year ago
  2. Kris5 Group Title
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    |dw:1356738160323:dw|

    • one year ago
  3. tkhunny Group Title
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    Indeed. Did you do what I said? That will solve it.

    • one year ago
  4. Kris5 Group Title
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    ok I'll try

    • one year ago
  5. tkhunny Group Title
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    Good call. Show us what you get.

    • one year ago
  6. Kris5 Group Title
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    |dw:1356738348623:dw|

    • one year ago
  7. Kris5 Group Title
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    8+radical15

    • one year ago
  8. tkhunny Group Title
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    SO CLOSE!!!! That's \(8+2\sqrt{15}\) and then you have a common factor in numerator and denominator that can help to simplify a little more. Excellent work. You're getting it.

    • one year ago
  9. Kris5 Group Title
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    I made an error

    • one year ago
  10. Kris5 Group Title
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    |dw:1356738746427:dw|

    • one year ago
  11. Kris5 Group Title
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    thanks:)

    • one year ago
  12. Kris5 Group Title
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    4+ radical 15

    • one year ago
  13. tkhunny Group Title
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    Spot on!

    • one year ago
  14. Kris5 Group Title
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    \[4+\sqrt{15}\]

    • one year ago
  15. Kris5 Group Title
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    thank you :)

    • one year ago
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