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![\bf x^3-27i\qquad \boxed{27=3^3}\qquad x^3=27i\implies x=\sqrt[3]{27i}\implies x=\sqrt[3]{3^3i} \\\\\\ x=3\sqrt[3]{i}](/tpl/images/0085/0585/27f2e.png)
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X3-27i=0 solve for the root equation...
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