$\"\"$

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The expression is $\"\"$ .

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Rewrite the expression is $\"\"$ .

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Apply difference of two cubes formula $\"\"$ .

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$\"\"$

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$\"\"$

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Apply zero product property: if ab = 0 then a = 0 and b = 0.

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$\"\"$ $\"\"$

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$\"\"$

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Subtract 1 from each side.

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$\"\"$

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$\"\"$

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Divide each side by 3.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Apply quadratic formula: $\"\"$ .

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$\"\"$

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Product of two same sings is positive.

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$\"\"$

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$\"\"$

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$\"\"$ ( $\"\"$ )

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$\"\"$ $\"\"$

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The solutions are $\"\"$ .