You can put this solution on YOUR website! -2/3 times square root of 63 to the 1/3 power
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= [(-2/3)*sqrt(63)]^(1/3)
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= [(-2/3)*3sqrt(7)]^(1/3)
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= [-2sqrt(7)]^(1/3)
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Note: This problem requires parentheses.
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Cheers,
Stan H.