![\sqrt[]{9} i](/tpl/images/2514/8006/f5ee8.png)
![\sqrt[]{ab}=\sqrt[]{a} *\sqrt[]{b} \\Therefore, \sqrt[]{-9} =\sqrt[]{9}*\sqrt[]{-1} \\\\\sqrt[]{-1}=i\\\\So, \sqrt[]{-9}= \sqrt[]{9}i](/tpl/images/2514/8006/88037.png)
Express the number in terms of i
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