Rasionalkan........ - Universityku

Rasionalkan……..

$rmdfrac{4 sqrt{2} }{ sqrt{5} + 3}$

$rm = dfrac{4 sqrt{2} }{ sqrt{5} + 3} times dfrac{ sqrt{5} - 3 }{ sqrt{5} - 3}$

$rm = dfrac{(4 sqrt{2})( sqrt{5} - 3) }{( sqrt{5} + 3)( sqrt{5} - 3)}$

$rm = dfrac{4 sqrt{10} - 12 sqrt{2} }{5 - 9}$

$rm = dfrac{4 sqrt{10} - 12 sqrt{2} }{-4}$

$rm = dfrac{4 sqrt{10} - 12 sqrt{2} }{ - 4}$

$boxed{rm = - sqrt{10} + 3 sqrt{2} } :$

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