Question

$1 { {21221 \sqrt[?]{?} }^{?} }^{2}$
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Answer 1

Your question seems incorrect. Still let me find the value of the square root of $121$, i.e. $\sqrt{121}$

We must know: $121=11\times 11=11^{2}$

$\Rightarrow \sqrt{121}=\sqrt{11^{2}}$

$\Rightarrow \sqrt{121}=11$ since $\sqrt{a^{2}}=a$

Answer: $\sqrt{121}=11$