![\bf 1)~\hspace{7em} \begin{array}{|l|ll} \cline{1-1} ~\hfill \sqrt{x}=9~\hfill \\ \cline{1-1}\\ \pm \sqrt{x}=9\\\\ \sqrt{x}=\mp 9\\\\ ~\hfill \text{\huge -9}~\hfill\\\\ \cline{1-1} \end{array} \\\\[-0.35em] \rule{34em}{0.25pt}](/tpl/images/0079/5694/88eaa.png)
![\bf 2) \\\\\\ \textit{area of a square}\\\\ A=s^2~~ \begin{cases} s=length~of\\ \qquad a~side\\[-0.5em] \hrulefill\\ A=4840 \end{cases}\implies 4840=s^2\implies \sqrt{4840}=s \\\\\\ 69.57\approx s~\hspace{5em}\boxed{69}\rule[0.35em]{7em}{0.25pt}\stackrel{\sqrt{4840}}{69.57}\rule[0.35em]{9em}{0.25pt}\boxed{70}](/tpl/images/0079/5694/4633f.png)
Stuck on two. plz . pre-all is hard
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