\left\{ \begin{array} { l } { g ^ { \prime } ( x ) = f ( x ) } \\ { f ( x ) = 3 x ^ { 2 } + 4 x + 7 } \end{array} \right.
Solve for x
x=\frac{-2+\sqrt{17}i}{3}\approx -0.666666667+1.374368542i
x=\frac{-\sqrt{17}i-2}{3}\approx -0.666666667-1.374368542i\text{, }f=0
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