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\left[\begin{array}{ccc}x= 6\\\\x=-6\end{array} " alt=" x^{2} =36 => \left[\begin{array}{ccc}x= 6\\\\x=-6\end{array} " align="absmiddle" class="latex-formula">
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\left[\begin{array}{ccc}x= \sqrt{23}\\\\x=-\sqrt{23}\end{array} " alt=" x^{2} =23 => \left[\begin{array}{ccc}x= \sqrt{23}\\\\x=-\sqrt{23}\end{array} " align="absmiddle" class="latex-formula">