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anonymous

  • 5 years ago

Hello All! Would anyone mind helping me with rationalizing denominators?

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  1. anonymous
    • 5 years ago
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    sure :)

  2. anonymous
    • 5 years ago
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    Is there a specific formula for this?

  3. anonymous
    • 5 years ago
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    well do u have an example problem? it would b easier to explain with one

  4. anonymous
    • 5 years ago
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    the first one is \[7/\sqrt{5}\]

  5. anonymous
    • 5 years ago
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    the slash line is equivalent to a fraction, FYI :)

  6. anonymous
    • 5 years ago
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    ....

  7. anonymous
    • 5 years ago
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    if you don't know it, that is fine.

  8. anonymous
    • 5 years ago
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    ok so what you do is you multiply both the numerator and the denominator by the square root of 5. so you have 7*square root of 5 __________________ square root of 5* square root of 5. this gives you 7square root of 5 ________________ 5

  9. anonymous
    • 5 years ago
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    does this help? sorry i dont know how to do the square root sign on here....

  10. anonymous
    • 5 years ago
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    yes- you basically simplify the it to be 7\[\sqrt{5}/5\]

  11. anonymous
    • 5 years ago
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    yep :) if u think i helped, then click the good answer button :)

  12. anonymous
    • 5 years ago
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    hhaha thanks. how about this one: 8 OVER 3+ sqrt 7

  13. anonymous
    • 5 years ago
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    hello?

  14. anonymous
    • 5 years ago
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    \[\frac{8}{3+\sqrt{7}}=12-4 \sqrt{7} \]

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