Question

cum se rationalizeaza :
$\frac{4}{2 \sqrt{5}-3 \sqrt{2} }$

Answer 1

$\displaystyle \frac{4}{2 \sqrt{5} -3 \sqrt{2} } = \frac{4(2 \sqrt{5}+3 \sqrt{2} ) }{20-18} = \frac{\not4_2(2 \sqrt{5} +3 \sqrt{2} )}{\not 2 _1} =2(2 \sqrt{5} +3 \sqrt{2} )$