\left\{ \begin{array} { l } { k = - b ^ { 2 } - 8 b - 13 } \\ { b = - \frac { m } { 4 } - 2 } \end{array} \right.
Solve for k, b, m (complex solution)
k=-b^{2}-8b-13
b\in \mathrm{C}
m=-4b-8
Solve for k, b, m
k=-b^{2}-8b-13
b\in \mathrm{R}
m=-4b-8
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