$(0.664 + 0.331 i)^{3} = 0$

Explanation

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$(0.664 + 0.331 i)^{3} (0.664 + 0 i)^{3} \overset{◯}{1} 0 + 0 i + 0 i^{2} + 0 i^{3} \overset{◯}{2} 0$
①	Find $(0 + 0 i)^{3}$ using formula $(A + B) = A^{3} + 3 A^{2} B + 3 A B^{2} + B^{3}$ where $A = 0$ and $B = 0 i$ . $(0 + 0 i)^{3} = 0^{3} + 3 \cdot 0^{2} \cdot 0 i + 3 \cdot 0 \cdot (0 i)^{2} + (0 i)^{3} = 00 i 0 i^{2} 0 i^{3}$
②	Combine like terms: $0 = 0$

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(0.664+0.331i)3=0

$(0.664 + 0.331 i)^{3} = 0$