Question

$\sqrt{ \sqrt{30} + \sqrt{21} \div \sqrt{30} - \sqrt{21} }$
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Answer 1

Step-by-step explanation:

Given,

$\sqrt{ \frac{ \sqrt{30} + \sqrt{21} }{ \sqrt{30} - \sqrt{21} } }$

$= \sqrt{ \frac{( { \sqrt{30} + \sqrt{21}) }^{2} }{30 - 21} }$

$= \sqrt{ \frac{ ({ \sqrt{30} + \sqrt{21}) }^{2} }{9} }$

$= \frac{ \sqrt{30} + \sqrt{21} }{3}$

HOPE THAT HELPED!!,