Leystu fyrir x (complex solution)
x=-\frac{3^{\frac{5}{6}}\left(1+\sqrt{3}i\right)\left(\sqrt{3\left(27B^{2}+162B-757\right)}+9B+27\right)^{-\frac{1}{3}}\left(\left(-\sqrt{3}-3i\right)\left(\sqrt{3\left(27B^{2}+162B-757\right)}+9B+27\right)^{\frac{2}{3}}+20\times 3^{\frac{5}{6}}\right)}{36}
x=\frac{3^{\frac{2}{3}}\left(\sqrt{3\left(27B^{2}+162B-757\right)}+9B+27\right)^{-\frac{1}{3}}\left(\left(3\left(\sqrt{3\left(27B^{2}+162B-757\right)}+9B+27\right)\right)^{\frac{2}{3}}+30\right)}{9}
x=-\frac{3^{\frac{5}{6}}\left(-\sqrt{3}i+1\right)\left(\sqrt{3\left(27B^{2}+162B-757\right)}+9B+27\right)^{-\frac{1}{3}}\left(\left(-\sqrt{3}+3i\right)\left(\sqrt{3\left(27B^{2}+162B-757\right)}+9B+27\right)^{\frac{2}{3}}+20\times 3^{\frac{5}{6}}\right)}{36}
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