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

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1. satellite73 Group Title

it is telling you if you rationalize the denominator you will get $-\frac{24+12\sqrt{15}}{11}$[

2. satellite73 Group Title

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 Group Title

oh i see where i went wrong thanks!