Solve for x, m
\left\{\begin{matrix}\\x=\frac{16}{17}-\frac{4}{17}i\approx 0.941176471-0.235294118i\text{, }m=-i\text{; }x=4\text{, }m=-1\text{; }x=4\text{, }m=\frac{1}{2}=0.5\text{; }x=\frac{16}{17}+\frac{4}{17}i\approx 0.941176471+0.235294118i\text{, }m=i\text{, }&\text{unconditionally}\\x=-\frac{-\sqrt{8-8m-7m^{2}}+m-4}{m^{2}+1}\text{, }m\in \mathrm{C}\setminus i,-i\text{; }x=-\frac{\sqrt{8-8m-7m^{2}}+m-4}{m^{2}+1}\text{, }m\in \mathrm{C}\setminus i,-i\text{, }&m\neq i\text{ and }m\neq -i\end{matrix}\right.
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