Question

simplify
$\sqrt[]{} 427 + \sqrt{} 181 + \sqrt{?} = 21$
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Answer 1

Hey

$\sqrt{427 + \sqrt{181 + \sqrt{?} } } = 21 \\ \\ squaring \: on \: both \: sides \\ \\ = > 427 + \sqrt{181 + \sqrt{?} } = 441 \\ \\ = > \sqrt{181 + \sqrt{?} } = 14 \\ \\ again \: squaring \: on \: both \: sides \\ \\ = > 181 + \sqrt{?} = 196 \\ \\ = > \sqrt{?} = 15 \\ \\ = > ? = 15 {}^{2} = 225$

Ur option is 1