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neverforgetvivistee

  • 4 years ago

dividing radicals: what's 12/2-√15 is it 2√15/5 or am i wrong? I don't understand wolfram alpha

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  1. anonymous
    • 4 years ago
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    it is telling you if you rationalize the denominator you will get \[-\frac{24+12\sqrt{15}}{11}\][

  2. anonymous
    • 4 years ago
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    easier just to do it. write \[\frac{12}{2-\sqrt{15}}\times \frac{2+\sqrt{15}}{2+\sqrt{15}}=\frac{12(2+\sqrt{15})}{-11}\]

  3. neverforgetvivistee
    • 4 years ago
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    oh i see where i went wrong thanks!

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