Question

$\sqrt{31 + \sqrt{21 + \sqrt{11 + x} } } = 6$
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Answer 1

√[31+{√21+(√11+x) }] =6

31+{√21+(√11+x)}=36 ( 6^2=36)

{√21+(√11+ x) }=36-31=5

21+√(11+x)=5^2

√(11+x)=25-21=4

11+x= 4^2=16

x= 16-11=5

:. x= 5

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