\left\{ \begin{array} { l } { x = \frac { 1 } { 2 } g t ^ { 2 } } \\ { g = 10 } \\ { x = 600000 } \end{array} \right.
Solve for x, g, t
x=600000\text{, }t=-200\sqrt{3}\approx -346.410161514\text{, }g=10
x=600000\text{, }t=200\sqrt{3}\approx 346.410161514\text{, }g=10
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