Risultato:[14]
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$\sqrt{\dfrac{36×\cancel9^1}{\cancel{81}_9}} +\sqrt{\dfrac{225×\cancel4^1×16}{\cancel{256}_{64} : 64}} =$
$= \sqrt{\dfrac{\cancel{36}^4}{\cancel9_1}} +\sqrt{\dfrac{225×1×16}{\cancel{64}^1 ×\dfrac{1}{\cancel{64}_1}}} =$
$= \sqrt4 +\sqrt{225×16} =$
$= \sqrt4 +\sqrt{3600} =$
$= 2+60 = 62$
√4+√15^2*64^2/16^2
2+15*64/16 = 2+15*4 = 62