Question

Calcule o valor da expressão numérica:

Answer 1

$\Large\boxed{\begin{array}{l}\rm y=\sqrt{15-\sqrt{32+\sqrt{25-\sqrt{81}}}}\\\rm y=\sqrt{15-\sqrt{32+\sqrt{25-9}}}\\\rm y=\sqrt{15-\sqrt{32+\sqrt{16}}}\\\rm y=\sqrt{15-\sqrt{32+4}}\\\rm y=\sqrt{15-\sqrt{36}}\\\rm y=\sqrt{15-6}\\\rm y=\sqrt{9}\\\rm y=3\end{array}}$