x3=8x^3 = 8x3=8 Take k=0,1,2k = 0, 1, 2k=0,1,2: k=0:x=2k = 0:\hspace{2em}x = 2k=0:x=2 k=1:x=2(cos2π3+isin2π3)=−1+i3k = 1:\hspace{2em}x = 2\left(\cos\frac{2\pi}{3} + i\sin\frac{2\pi}{3}\right) = -1 + i\sqrt{3}k=1:x=2(cos32π+isin32π)=−1+i3 k=2:x=2(cos4π3+isin4π3)=−1−i3k = 2:\hspace{2em}x = 2\left(\cos\frac{4\pi}{3} + i\sin\frac{4\pi}{3}\right) = -1 - i\sqrt{3}k=2:x=2(cos34π+isin34π)=−1−i3 x=2,−1+i3,−1−i3\boxed{x = 2, -1 + i\sqrt{3}, -1 - i\sqrt{3}}x=2,−1+i3,−1−i3