Nonlinear system with complex numbers Solve the following system under the complex numbers (without eulerian form or polar form) 
$$z^3 + w^5 = 0 \\ z^2 \bar w^4 = 1$$
I have found that $(\pm 1, \mp 1)$ satisfy the equations as well as letting $z,w$ be some powers of $i$ and using divisibility.
Are there any other solutions?  
 A: Starting with the equations: $$z^3 + w^5 = 0 \\ z^2 \bar w^4 = 1$$ we find that $$w^4 = \bar z^{-2}.$$ Pluging this into the first equation yields $$z^3 + \bar{z}^{-2} w = 0$$
Which is equivalent to: $$|z|^4 z = - w$$ by noting that $z\cdot \bar z = |z|^2$.
Finally replacing this back into the original equation: $$z^2 \bar w^4 = z^2 \bar z^4 |z|^{16} = \bar z^2 |z|^{20} = 1$$
This means that $|z|^{21}=1$, and $|z| = 1$. Hence $\bar z^2 = 1$, and $w=-z$. There are only two roots to the equation $\bar z^2 - 1$, so $z$ could be $\pm 1$. Also $w = -z$. This gives the solutions $(1,-1)$ and $(-1,1)$. Which can be seen to be valid.
A: By taking absolute values of $z$ and $w$ from the first equation $$|z|^3 = |w|^5$$ Since neither $z$ nor $w$ can be zero, $$|z| = |w|^{5/3}.$$ From the second $$1 = |z|^2|w|^4 = |w|^{22/3},$$ so $$|w| = |z| = 1.$$
Since $|w| = 1$, $\bar{w} = w^{-1}$ and $z^2 = w^4$. Substituting in the first equation gives $$w^4(z + w) = 0,$$ so $z = -w$. Plugging that into $w^4 = z^2$ gives $$w^4 = w^2 \Leftrightarrow w^2(w^2 - 1) = 0.$$ So there are no solutions except $(\pm 1, \mp 1)$.
A: Let $z=re^{it}$. The second equation then gives us
$$\bar{w}^4 = r^{-2}e^{-2it} \implies \bar{w} = r^{-1/2}e^{-i(t+n\pi)/2} \implies w = r^{-1/2}e^{i(t+n\pi)/2}$$ We also need
$$z^3 + w^5 = 0 \implies r^3e^{3it} = -r^{-5/2}e^{5i(t+n\pi)/2} \implies r^{11/2}e^{3it-5it/2-5n\pi i/2} = 1$$
This gives us $r=1$ and $\left(t/2-5n\pi/2\right) = 2k\pi \implies t = 5n\pi+4k\pi$. Hence, $z = \pm1$. Hence, the only solutions are
$$(z,w) = \pm (1,-1)$$
