যদি $\sqrt[3]{x+i y}=p+i q$ হয় তবে-

$\frac{x}{p}+\frac{y}{q}=4\left(p^{2}-q^{2}\right)$

$\frac{x}{p}-\frac{y}{q}=4\left(p^{2}-q^{2}\right)$

$\frac{x}{p}+\frac{y}{q}=4\left(p^{2}+q^{2}\right)$

$\frac{x}{p}-\frac{y}{q}=4\left(p^{2}+q^{2}\right)$