Question

O valor de $O valor de \sqrt{15- \sqrt{32+ \sqrt{25- \sqrt{81} } } } e : A)1 B)2 C)3 D)4 E)5$

Answer 1

$\sqrt{15 - \sqrt{32 + \sqrt{25 - \sqrt{81} } } } =\\\\ \sqrt{15 - \sqrt{32 + \sqrt{25 - 9 } } } =\\\\ \sqrt{15 - \sqrt{32 + \sqrt{16 } } } =\\\\ \sqrt{15 - \sqrt{32 + 4 } } =\\\\ \sqrt{15 - \sqrt{36 } } =\\\\ \sqrt{15 - 6 } =\\\\ \sqrt{9 } =\\\\ \boxed{\boxed{3}}$